Early Days of Syntex Life After Syntex Continued from Page 8 Continued from Page 9

Total Page:16

File Type:pdf, Size:1020Kb

Early Days of Syntex Life After Syntex Continued from Page 8 Continued from Page 9 23-2 CHF 2005 9/8/05 2:45 PM Page 8 George Rosenkranz (center) displays a test tube of yam-derived diosgenin, the substance needed to produce steroid hormones, and its raw source material, Mexican yams. Grouped around him from left to right are Alex Nussbaum, Mercedes Velasco, Gilbert Stork, Jan Pataki, Enrique Batres, Juan Berlin, Carl Djerassi, Rosa Yashin, Octavio Mancera, Jesùs Romo. CHF Collections. Courtesy of Roche. LifeLife afterafter SyntexSyntex By Alejandro Zaffaroni Early Years of age. My father was in the banking business, Alejandro Zaffaroni at My life started in Montevideo, Uruguay, many and our family enjoyed a good standard of living. CHF in 2004. Photo by years ago. Uruguay is a small country; today Early in my life, I lost both my parents. My Steven Begleiter. it has three million people. Back then life in mother passed away when I was 12 years of age, Uruguay was wonderful. It was a great place to and my father when I was 18. Now, when I look live—safe and peaceful—and the standard of back, I think that loss forced me to learn to be on living was high. For many years, Uruguay was my own. I was also lucky enough to have an uncle known as the Switzerland of South America. and an older sister who supported and encour- The social and political organizations were aged me to continue my education. very progressive: women were allowed to vote; After earning a B.Sc. at the University of it had the highest rates of literacy; it was the Montevideo in 1941, I began studying at the first social democracy on the continent; pri- school of medicine. I soon realized, however, that mary, secondary, and university education was anatomy was not one of my favorite courses. I (and still is) free. had taken some chemistry and biochemistry The population was and still is mainly of courses while in premed, and I decided to study European descent, mostly Italians and Span- biochemistry instead. Since there was no bio- iards. My grandfather emigrated from Italy chemistry degree in Uruguay or South America, TheThe EarlyEarly DaysDays and arrived in Uruguay when he was 16 years I started to inquire about studying abroad. of Syntex Continued on page 11 By George Rosenkranz Flashbacks from My Life The reaction of the owner, Angel Vieta, dean If I examine my early youth, I can detect hardly of the University of Havana medical school, was any signs of entrepreneurship. Sure, critical deci- negative. To quote: “In the 18 successful years at sions had to be made: first, to leave Hungary to my firm, I never had a chemist. Why should I hire study in Switzerland over the strong objections you now?” My answer was short and bold: “Give of my parents; later, to abandon my academic me a chance and I’ll show you.” career, my wonderful mentor, Leopold Ruzicka, Apparently impressed, he offered me the and the old continent for an essentially unknown glorious salary of $20 a week. I did not fail him. future. In retrospect, I consider the causes of A dozen products later, I was making $1,000 a these events, speaking in chemical terms, more month and 15% on those products’ sales. The the push-pull effect of the grave political circum- university offered me a professorship. I declined stances of that time than entrepreneurship. but eventually agreed to direct a research program When Pearl Harbor was attacked, I was in Summer 2005 Summer for Ph.D. candidates in my laboratories. The most 2005 Summer Havana waiting for a boat to Ecuador, where I famous of my two dozen students of those days George Rosenkranz at had been offered a chair in organic chemistry at was Ernest Eliel, who became a president of the CHF in 2004. Photo by Steven Begleiter. the University of Quito. After a futile wait, I de- American Chemical Society. 23:2 cided to take advantage of President Fulgencio My Zurich-born interest in steroids led me to 23:2 Batista’s decree allowing refugees to settle in look for domestic sources of steroidal sapogenins Cuba. And when the national university showed suitable for hormone synthesis. Finding none, I no interest in me, I tried to get a job at the largest imported sarsaparilla root from Mexico and made local pharmaceutical firm—Laboratorios Vieta- small quantities of progesterone and testosterone. Plascencia. Rumors of these activities led to an invitation to Chemical Heritage Chemical Heritage visit a start-up firm in Mexico named Syntex. Alejandro Zaffaroni (left) and Carl Djerassi discuss norethindrone, Chemical Heritage the first orally effective progestational agent and the first wholly Continued on page 10 synthetic hormone. Sold by Syntex as Norinyl. CHF Collections. Courtesy of Carl Djerassi. 8 9 23-2 CHF 2005 9/8/05 2:45 PM Page 10 The Early Days of Syntex Life after Syntex Continued from page 8 Continued from page 9 Syntex Going to the United States retire. The new head of our depart- utilized my paper chromatography On my arrival in Mexico I found a I managed to get a scholarship to come ment, Elmer Stotz, formerly of technique to produce cortisone at the small family enterprise dedicated to the to the United States thanks to the Insti- Harvard, told us at one of our first lowest cost and in the shortest time and manufacture of progesterone based on tute of International Education. My meetings that he was working on cy- thus was able to upstage all other methods of a brilliant but tempera- two options were Harvard University tochrome C and wanted all of us to “pharmas.” mental chemist, Russell E. Marker (see or the University of Rochester. work on his project. This created a To Mexico—and Back CH, Summer 1987, pp 3–6). However, I boarded a Liberty ship in Monte- problem for me because I had already The early years of Syntex in Mexico the owners had had a bitter falling-out video while World War II was still go- started working on my paper chroma- were a great experience for me. We with Marker, who left and shortly ing on and arrived in the United States tography idea and was convinced it were doing transformative science and thereafter set up a competitive venture. at the port of New York on 16 August would work out. I asked Stotz if I could had an incredible group of very smart In a burst of true entrepreneurial 1945, two days after the Japanese had still work on my own project on my and talented scientists. The progress we spirit, I accepted the offer to take over surrendered. For me, arriving in New own time at night, and he agreed. After made in the area of steroids made us the technical part of direction. My York at that time was an unforgettable a few months he reviewed my own realize that Syntex could become an compensation was roughly equivalent experience. It was like a big party: peo- work, saw that I was onto something, important company at the edge of new to the one in Havana but included the ple were celebrating in the streets; there and told me to forget about his project technology. Once we realized this po- option of buying 15% of Syntex stock was music; it was incredible. After a and to continue with my own work. I Russell Marker with his Syntex lab assistants, 1945. CHF Collections. Courtesy of Roche. tential, George and I started to trans- at book value. No big deal, since the couple of weeks I went on to Harvard. have always appreciated the opportu- form Syntex from a chemical company company was $330,000 in the red and Since profits selling hormones and There I met a young professor who ex- nity he gave me. Going Public into a pharmaceutical company. practically broke. For years to come, steroid intermediates were significant, plained my options. I would be part of I finished my Ph.D. in 1949 and The stage was set for the next big step in At one point, we realized that to my darling wife, Edith, and I faced the nobody questioned my budget. I in- a group of six students following a re- stayed at Rochester while I continued Syntex’s history: the change of owner- become a top-tier pharmaceutical com- dilemma of whether to buy a new vested in research, bringing the most search program under the guidance of my postdoctoral work. I developed a ship. This occurred when the legendary pany we needed to move to the United household item or invest in company talented scientists available to Mexico. the professor. paper chromatography technique that Wall Street entrepreneur Charles Allen States. Carl Djerassi, one of our distin- stock. Interestingly, organic chemists, in con- I then went to visit the University became very useful in the synthesis of decided to acquire the promising Mexi- guished Syntex scientists, had recently There were no manuals, no process trast to biologists, were more ready to of Rochester. During those times, the steroids; it allowed for much cheaper can upstart and eventually take it public. started teaching at Stanford University descriptions, and reagents and inter- assume risks. entire medical school was working on and faster analyses than the methods This group acquired 100% of the in Palo Alto, California. Carl encour- mediates bore coded labels. My staff The big exception was an outstand- the Manhattan Project. As a foreign developed by others at about the same Syntex stock for $2 million in cash and aged us to settle in Palo Alto.
Recommended publications
  • Biochemistrystanford00kornrich.Pdf
    University of California Berkeley Regional Oral History Office University of California The Bancroft Library Berkeley, California Program in the History of the Biosciences and Biotechnology Arthur Kornberg, M.D. BIOCHEMISTRY AT STANFORD, BIOTECHNOLOGY AT DNAX With an Introduction by Joshua Lederberg Interviews Conducted by Sally Smith Hughes, Ph.D. in 1997 Copyright 1998 by The Regents of the University of California Since 1954 the Regional Oral History Office has been interviewing leading participants in or well-placed witnesses to major events in the development of Northern California, the West, and the Nation. Oral history is a method of collecting historical information through tape-recorded interviews between a narrator with firsthand knowledge of historically significant events and a well- informed interviewer, with the goal of preserving substantive additions to the historical record. The tape recording is transcribed, lightly edited for continuity and clarity, and reviewed by the interviewee. The corrected manuscript is indexed, bound with photographs and illustrative materials, and placed in The Bancroft Library at the University of California, Berkeley, and in other research collections for scholarly use. Because it is primary material, oral history is not intended to present the final, verified, or complete narrative of events. It is a spoken account, offered by the interviewee in response to questioning, and as such it is reflective, partisan, deeply involved, and irreplaceable. ************************************ All uses of this manuscript are covered by a legal agreement between The Regents of the University of California and Arthur Kornberg, M.D., dated June 18, 1997. The manuscript is thereby made available for research purposes. All literary rights in the manuscript, including the right to publish, are reserved to The Bancroft Library of the University of California, Berkeley.
    [Show full text]
  • Mannen Och Rotknölen Som Gav Idén Till P-Pillret
    n kultur Redaktör: Gabor Hont 08-790 34 80 [email protected] Foto:TropicalsTop ROTKNÖL Rotknölen av mexikansk sköldpaddsjams är oumbärlig för Mannen och rotknölen produktion av halvsyntetiskt som gav idén till p-pillret progesteron. etenskapens historia rymmer ett galleri började den 12 mars 1902 då han föddes på en gård av udda och egensinniga personer som utanför Hagerstown i Maryland. Som 16-åring be- kompromisslöst går sina egna vägar stämde han sig för att bli vetenskapsman, och vid 21 övertygade om sina idéers hållbarhet års ålder tog han en kandidatexamen i organisk kemi om de så har hela världen – eller njugga vid Marylands universitet och året därpå en magis- Vuniversitet och industrier – emot sig. I det här fallet terexamen i fysikalisk kemi. [1]. På väg mot sin dok- handlar det om Russell Earl Marker och hans ban- torsexamen vägrade han att gå några obligatoriska brytande framställning av halvsyntetiskt progeste- kurser i fysikalisk kemi eftersom han inte ville slösa ron som med tiden resulterade i en kaskad av nya lä- bort tid på något han ansåg sig redan kunna. Det blev kemedel mot till exempel astma, reumatism, ämnes- FORSKARE en schism; universitetet vägrade att specialanpassa omsättningssjukdomar, brännskador, allergier, can- Russell Earl hans studier och han varnades för att i evig tid få sit- cer och allvarliga infektioner. Markers arbete lade Marker, som ta och analysera urin om han inte följde regelverket. också grunden för lanseringen av p-piller på 1960-ta- han såg ut un- Marker lyssnade inte på det örat – i stället lämnade let och infriade den mångtusenåriga önskan om der sina år vid han universitetet utan att avlägga någon doktors- barnbegränsning.
    [Show full text]
  • International Historic Chemical Landmark Acclaims Success of Mexican Steroid Industry and a U.S
    Journal of the Mexican Chemical Society ISSN: 1870-249X [email protected] Sociedad Química de México México Raber, Linda Steroid industry honored. International historic chemical landmark acclaims success of mexican steroid industry and a U.S. chemist who made it possible Journal of the Mexican Chemical Society, vol. 43, núm. 6, noviembre-diciembre, 1999, pp. 235-237 Sociedad Química de México Distrito Federal, México Available in: http://www.redalyc.org/articulo.oa?id=47543610 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative Revista de la Sociedad Química de México, Vol. 43, Núm. 6 (1999) 235-237 Noticias Steroid Industry Honored† International Historic Chemical Landmark Acclaims Success of Mexican Steroid Industry and a U.S. Chemist Who Made it Possible Linda Raber American Chemical Society 1155-16th St., N.W, Washington, D.C. 20036. U.S.A. “There are more stories told about Russell Marker than any he founded in Mexico City with Emeric Somlo and Federico other chemist. Although perhaps many of these stories are A. Lehmann. apocryphal, they are so fascinating that most of us cannot bear “This low-cost progesterone eventually became the pre- to stop repeating them. This is the oral history of our profes- ferred precursor in the industrial preparation of the anti- sion that we pass to our colleagues and our students. They are inflammatory drug cortisone. In 1951, Syntex researchers syn- the campfire stories that bind our profession together” – thesized the first useful oral contraceptive from Marker’s start- Steven M.
    [Show full text]
  • American Made 2.0
    American Made 2.0 How Immigrant Entrepreneurs Continue to Contribute to the U.S. Economy by Stuart Anderson NATIONAL FOUNDATION FOR AMERICAN POLICY NATIONAL VENTURE CAPITAL ASSOCIATION About the Study This study commissioned by the National Venture Capital Association was prepared by Stuart Anderson, Executive Director, National Foundation for American Policy, a non-profit, non-partisan public policy research organization. 2 Contents Executive Summary 4 Section I: Immigrant-Founded Public and Privately-Held 10 Venture-Funded Companies Section II: Private Company Perspectives on U.S. 18 Immigration Policy Section III: U.S. Immigration Policy and Proposed Changes to 21 the Immigration System Conclusion 27 About the Author 28 Endnotes 29 3 Executive Summary Entrepreneurs are the heroes of a market-based economy, driving innovation and job creation. This NVCA study shows if entrepreneurs are indeed heroes, then immigrant entrepreneurs have made heroic contributions to America’s economy. The analysis concludes the contributions of immigrants to the United States would be even greater if Congress adopted the right policies on startups and high skill immigration. In 2006, the National Venture Capital Association released American Made: The Impact of Immigrant Entrepreneurs and Professionals on U.S. Competitiveness. It received significant attention as the first study to examine the role of immigrants in starting venture-funded companies. The study found immigrants started many U.S. venture-backed companies that became publicly traded and that these companies had achieved a significant market value, representing a benefit to the American economy, employees and investors. The new study used the Thomson Reuters database and performed extensive research to determine the nativity of the founders of U.S.
    [Show full text]
  • The Birth of the Pill
    The contraceptive pill The birth of the pill Most primitive societies knew of plants that would control their fertility, but until 1960 there was no clinically proven drug that provided a reliable method of contraception. Fifty years on, John Mann reports on the conception and evolution of the contraceptive pill In Mexico City in 1943, the small the same basic ring system as carry out similar chemistry on the company Laboratorios Hormona In short cholesterol but with an oxidised more accessible diosgenin from the occupied a niche in the market The first cheap and side-chain. He was intrigued by the genus Dioscorea. for pharmaceuticals. Its founders, simple route to make possibility of using these oxidised Being something of a botanist as Hungarian Emeric Somlo and progesterone, a key sites to affect a cleavage of the well as a chemist, Marker headed German Federico Lehmann, were hormone in the pill, was side-chain and make the degraded across the border into Mexico in making a modest living selling developed in the 1940s structures of the sex hormones. search of Dioscorea mexicana – the natural hormones extracted from The first pill was This is, of course, exactly what Mexican yam that the locals called animal organs. launched in 1960, and by happens in the enzyme-mediated cabeza de negro. After considerable Imagine their surprise when one 1966 more than 5 million oxidative metabolism of cholesterol difficulties he found a good source day a rather eccentric American US women were using to produce progesterone (see near the city of Orizaba in Veracruz professor of chemistry called Russell oral contraceptives Chemistry World, November 2009, State, and transported large Marker arrived in their office There have been no p54).
    [Show full text]
  • The Scientific Impact of Mexican Steroid Research 1935-1965
    The Scientific Impact of Mexican Steroid Research 1935–1965: A Bibliometric and Historiographic Analysis Yoscelina I. Hernandez-Garcia Technology, and Society, Cinvestav-IPN, Apdo postal, Mexico, DF 14–740, Mexico. E-mail: [email protected] José Antonio Chamizo Facultad de Química, Universidad Nacional Autónoma de México, Mexico, DF 04510, Mexico. E-mail: [email protected] Mina Kleiche-Dray Ceped (IRD Université Paris V Descartes), and IFRIS, Paris 75006, France. E-mail: [email protected] Jane M. Russell Instituto de Investigaciones Bibliotecológicas y de la Información, UNAM, Mexico, DF 04510, Mexico. E-mail: [email protected] We studied steroid research from 1935 to 1965 that led to Zubieta Garcia, & Rodriguez-Sala, 2013; Luna-Morales, the discovery of the contraceptive pill and cortisone. Collazo-Reyes, Russell, & Pérez-Angón, 2009). Luna- Bibliometric and patent file searches indicate that the Morales and coauthors identified four different modes of Syntex industrial laboratory located in Mexico and the Universidad Nacional Autónoma de México (UNAM) pro- Mexican scientific production in the first half of the 20th duced about 54% of the relevant papers published in century: amateur, institutional, academic, and industrial. mainstream journals, which in turn generated over 80% The last of these emerged only at the end of this period as a of the citations and in the case of Syntex, all industrial result of the industrial activity associated with steroid patents in the field between 1950 and 1965. This course research (Luna-Morales et al., 2009). of events, which was unprecedented at that time in a developing country, was interrupted when Syntex In the mid-20th century it was inconceivable to imagine moved its research division to the US, leaving Mexico that cutting-edge research like with steroids could be done in with a small but productive research group in the chem- a country such as Mexico (Djerassi, 1992; Redig, 2005), but istry of natural products.
    [Show full text]
  • Thesis Rests with Its Author
    University of Bath PHD The biotransformation of diosgenin and its precursors extracted from Trigonella foenumgraecum L. seed. Saunders, Roger Award date: 1982 Awarding institution: University of Bath Link to publication Alternative formats If you require this document in an alternative format, please contact: [email protected] General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Download date: 08. Oct. 2021 THE BIOTRANSFORMATION OF DIOSGENIN AND ITS PRECURSORS EXTRACTED FROM TRIGONELLA FOENUMGRAECUM L. SEED Submitted by Roger Saunders for the degree of Doctor of Philosophy of the University of Bath 1982 COPYRIGHT "Attention is drawn to the fact that copyright of this thesis rests with its author. This copy of the thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be published without the prior written consent of the author." "This thesis may not be consulted, photocopied or lent to other libraries without the permission of the author for 5 years from the date of acceptance of the thesis".
    [Show full text]
  • Woody Powell
    Note to readers: Please do not be alarmed by the length. There is a 48 page Appendix. You may want to print only the paper itself, pp. 1- 66. We would, however, welcome reactions to the Appendix and thoughts on how and whether to present the case materials. Chance, Necessité, et Naïveté: Ingredients to create a new organizational form* Walter W. Powell Kurt Sandholtz Stanford University January, 2010 *The title comes from remarks by Genentech co-founder Herbert Boyer (2001: 95-96): “I think if we had known about all the problems we were going to encounter, we would have thought twice about starting. I once gave a little talk to a group at a Stanford Business School luncheon, and I took off on the title of a book on evolution by Jacques Monod…Chance et Necessité. The title of my talk was ‘Chance, Necessité, et Naïveté.’ Naïveté was the extra added ingredient in biotechnology.” We thank Tricia Soto, librarian at the Center for Advanced Study in the Behavioral Sciences, and Tanya Chamberlain for assistance in finding archival materials. Martin Kenney was most generous in providing us with the source documents he used in writing his 1986 book, one of the very first studies of the development of the biotechnology industry. Our thanks to the Center for Advanced Study for hosting Professor Powell while the chapter was prepared. We are grateful to Pablo Boczkowski, Ron Burt, John Padgett, members of the Networks and Organizations Workshop at Stanford, and the Organizations and Markets workshop at the University of Chicago for comments on our initial draft.
    [Show full text]
  • Top 100 Living Contributors to Biotechnology
    Over the last 30 years, a small group of visionaries in science, technology, legislation and business have driven the development of biotechnology. THE Today, in the midst of tremendous advances in medicine and agriculture, this exhibition and accompanying brochure pays tribute to the leaders that have shaped the biotechnology industry. TOP The Top 100 Living Contributors to Biotechnology have been selected by their peers and through independent polls conducted by Reed Exhibitions, a division of Reed Elsevier. Senior staff throughout the biotechnology industry have identified the most influential and inspirational pioneers. The results 100 are presented here alphabetically. LIVING CONTRIBUTORS To those named in the Top 100, and the many other contributors not listed, TO BIOTECHNOLOGY the biotechnology community is deeply appreciative. P 1 4 MICHAEL ASHBURNER SEYMOUR BENZER PAUL BERG Michael Ashburner is Professor Seymour Benzer instilled the Paul Berg is Cahill Professor in of Biology at the University of fundamental idea that genes Cancer Research, Emeritus, at Cambridge where he received his control behaviour. He began his the Stanford University School undergraduate degree and PhD, career studying gene structure of Medicine, and director emeri- both in genetics. Ashburner’s and code, developing a method tus of the Beckman Centre for current major research interests to determine the detailed struc- Molecular and Genetic are the structure and evolution of ture of viral genes in 1955. He Medicine. He is one of the prin- genomes. Most of his research then switched to the field of cipal pioneers in the field of 33 has been with the model organ- neurogenetics, focusing on “gene splicing.” Berg, along with ism Drosophila melanogaster, the inheritance of behaviour.
    [Show full text]
  • George Rosenkranz, 102, a Developer of the Birth Control Pill, Is Dead - the New York Times
    6/24/2019 George Rosenkranz, 102, a Developer of the Birth Control Pill, Is Dead - The New York Times George Rosenkranz, 102, a Developer of the Birth Control Pill, Is Dead By Robert D. McFadden June 23, 2019 George Rosenkranz, a chemist who, with two colleagues, altered human reproductive history in a Mexico City lab in 1951 by synthesizing the key ingredient in what became the oral contraceptive known as “the pill,” died on Sunday at his home in Atherton, Calif. He was 102. His grandson Adrian Rosenkranz confirmed the death. Besides a seminal contribution to birth-control science, Dr. Rosenkranz’s team achieved the first practical synthesis of cortisone, the drug used to treat rheumatoid arthritis and reduce painful inflammations in muscles and joints. He was also a world-class contract bridge champion whose wife was kidnapped during a tournament in Washington in 1984 and ransomed for $1 million. A Hungarian Jew and Swiss-trained chemical engineer who fled fascism as World War II engulfed Europe, Dr. Rosenkranz took refuge in Cuba and after the war became the research director of Syntex, a pharmaceutical lab in Mexico. There, in a scientific backwater, he assembled a small group of chemists who laid the groundwork for revolutionary advances in steroid hormone drugs. Scientists had long known that high levels of estrogen and progesterone effectively inhibited ovulation. But synthesizing those hormones from animal or plant extracts had been too expensive and relatively ineffective for use in commercial oral contraceptives. In the early 1950s, a race was on among pharmaceutical competitors to crack the chemical code for an ovulation restraint.
    [Show full text]
  • Product Monograph
    PRODUCT MONOGRAPH PrMICRONOR® Norethindrone Tablets, USP 0.35 mg Oral Contraceptive Janssen Inc. Date of Revision: 19 Green Belt Drive December 19, 2012 Toronto, Ontario M3C 1L9 www.janssen.ca Submission Control No.: 158860 All trademarks used under license. © 2012 Janssen Inc. Page 1 of 32 PRODUCT MONOGRAPH PrMICRONOR® Norethindrone Tablets, USP 0.35 mg PHARMACOLOGICAL CLASSIFICATION Synthetic, steroidal oral contraceptive. CLINICAL PHARMACOLOGY The mechanism of contraception action of MICRONOR® Tablets is multicausal, primarily at the local pelvic level and secondarily at the systemic level. The hormonal effect is mainly progestational. Pelvic effects include changes in the cervical mucus and endometrium. Systemic effects involve mainly the inhibition of secretion of pituitary gonadotrophins which in turn prevents follicular maturation and ovulation. Studies by Moghissi,2,3,4 Beck,5 Fortier and Lefebvre,4,6 and others suggest the following priority of causes: 1. Inhibitory cervical mucus changes including increased viscosity and cell content, with inhibition of sperm transport or migration. Changes in cervical mucus reach their peak 3-4 hours after MICRONOR® pill intake and the possibility of sperm penetration remains low for 16-19 hours. 2. Suppression of FSH levels and the LH surge. 3. Abnormal ovulation and deficient corpus luteum function. (Serum progesterone levels may be suppressed in the second half of the menstrual cycle when they are usually low, i.e., dysphasic.) Serum estrogens may be increased above normal early in the cycle. 4. Endometrial changes (progestational) unfavourable to implantation. INDICATIONS AND CLINICAL USE MICRONOR® Tablets are indicated for conception control. MICRONOR® Tablets contain a low dosage of norethindrone without the addition of an estrogen agent.
    [Show full text]
  • Oral Contraceptives - Journey So Far: a Review Kanaka Bhushanam GVVS1 and Sakuntala Devi Gampa2,*
    REVIEW Oral contraceptives - journey so far: A review Kanaka Bhushanam GVVS1 and Sakuntala Devi Gampa2,* 1 2 Gitam Medical Collage, Gandhi Nagar, Rushikonda, Visakhapatnam, Andhra Pradesh, India Krishna Institute of Medical Sciences, Minister Road, Secunderabad-500003, Telangana, India Abstract since 1970s. As per WHO (1998), over 100 million women are using oral contraceptive pills (OCPs) worldwide, mostlyOral contraceptive in developed is acountries. widely accepted In India and only most 2% effectiveof married method women of offertility reproductive control. ageIts wereuse has using been OCPs growing for fertility control during the period from 1990 to 2001. The history, evolution and development of oral pills till Keywords:date is discussed oral contraception; along with the fertility benefits, control; risks and contraceptive side effects pills of oral contraceptive pills. *Corresponding author: Dr. Sakuntala Devi Gampa, Gitam Introduction Medical Collage, Gandhi Nagar, Rushikonda, Visakhapatnam, [email protected] Once upon a time contraception was a taboo in many countries and practicing or even promoting ReceivedAndhra Pradesh, 28 October India. 2015; Email: Revised 11 December 2015; Accepted 19 December 2015; Published 29 December 2015 contraception was punishable. From that situation oral pills have now reached a stage where they are Citation: most widely accepted method of birth control and Kanakabhushanam GVVS, Gampa SD. Oral1 contraceptives- also became a useful therapeutic modality for many journey so far: A review. J Med Sci Res. 2016; 4(1):35-40. DOI: gynaecological conditions avoiding unnecessary Chttp://dx.doi.org/10.17727/JMSR.2016/4-01opyright: © 2016 Kanakabhushanam GVVS, et al. Published by hysterectomies. Many breakthroughs in the article distributed under the terms of the Creative Commons evolution of birth pills are responsible for today’s AttributionKIMS Foundation License, and which Research permits Center.
    [Show full text]