Reproduction, Pregnancy and Birth
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3 Embryology and Development
BIOL 6505 − INTRODUCTION TO FETAL MEDICINE 3. EMBRYOLOGY AND DEVELOPMENT Arlet G. Kurkchubasche, M.D. INTRODUCTION Embryology – the field of study that pertains to the developing organism/human Basic embryology –usually taught in the chronologic sequence of events. These events are the basis for understanding the congenital anomalies that we encounter in the fetus, and help explain the relationships to other organ system concerns. Below is a synopsis of some of the critical steps in embryogenesis from the anatomic rather than molecular basis. These concepts will be more intuitive and evident in conjunction with diagrams and animated sequences. This text is a synopsis of material provided in Langman’s Medical Embryology, 9th ed. First week – ovulation to fertilization to implantation Fertilization restores 1) the diploid number of chromosomes, 2) determines the chromosomal sex and 3) initiates cleavage. Cleavage of the fertilized ovum results in mitotic divisions generating blastomeres that form a 16-cell morula. The dense morula develops a central cavity and now forms the blastocyst, which restructures into 2 components. The inner cell mass forms the embryoblast and outer cell mass the trophoblast. Consequences for fetal management: Variances in cleavage, i.e. splitting of the zygote at various stages/locations - leads to monozygotic twinning with various relationships of the fetal membranes. Cleavage at later weeks will lead to conjoined twinning. Second week: the week of twos – marked by bilaminar germ disc formation. Commences with blastocyst partially embedded in endometrial stroma Trophoblast forms – 1) cytotrophoblast – mitotic cells that coalesce to form 2) syncytiotrophoblast – erodes into maternal tissues, forms lacunae which are critical to development of the uteroplacental circulation. -
Reproductive System, Day 2 Grades 4-6, Lesson #12
Family Life and Sexual Health, Grades 4, 5 and 6, Lesson 12 F.L.A.S.H. Reproductive System, day 2 Grades 4-6, Lesson #12 Time Needed 40-50 minutes Student Learning Objectives To be able to... 1. Distinguish reproductive system facts from myths. 2. Distinguish among definitions of: ovulation, ejaculation, intercourse, fertilization, implantation, conception, circumcision, genitals, and semen. 3. Explain the process of the menstrual cycle and sperm production/ejaculation. Agenda 1. Explain lesson’s purpose. 2. Use transparencies or your own drawing skills to explain the processes of the male and female reproductive systems and to answer “Anonymous Question Box” questions. 3. Use Reproductive System Worksheets #3 and/or #4 to reinforce new terminology. 4. Use Reproductive System Worksheet #5 as a large group exercise to reinforce understanding of the reproductive process. 5. Use Reproductive System Worksheet #6 to further reinforce Activity #2, above. This lesson was most recently edited August, 2009. Public Health - Seattle & King County • Family Planning Program • © 1986 • revised 2009 • www.kingcounty.gov/health/flash 12 - 1 Family Life and Sexual Health, Grades 4, 5 and 6, Lesson 12 F.L.A.S.H. Materials Needed Classroom Materials: OPTIONAL: Reproductive System Transparency/Worksheets #1 – 2, as 4 transparencies (if you prefer not to draw) OPTIONAL: Overhead projector Student Materials: (for each student) Reproductive System Worksheets 3-6 (Which to use depends upon your class’ skill level. Each requires slightly higher level thinking.) Public Health - Seattle & King County • Family Planning Program • © 1986 • revised 2009 • www.kingcounty.gov/health/flash 12 - 2 Family Life and Sexual Health, Grades 4, 5 and 6, Lesson 12 F.L.A.S.H. -
Female Reproductive System External Female Reproductive Organs Internal Female Reproductive Organs Menstrual Cycle
Prevention and Recognition of Obstetric Fistula Training Package Module 3: Female Reproductive System External female reproductive organs Internal female reproductive organs Menstrual cycle • Menstruation usually starts when a girl is between 11-15 years of age (menarche) and continues until 50-60 years of age (menopause) • Monthly cycle if a woman is not pregnant or breastfeeding (can also be affected by some methods of family planning) • Controlled by hormone cycles – Follicular stimulating hormone (FSH) and Luteinizing hormone (LH) from the pituitary gland – Estrogen and progesterone from the ovaries • After the egg is released from the ovary (ovulation) if there is no fertilization with sperm, there is a discharge of blood and mucous from the uterus and the cycle repeats Changes during pregnancy • A woman can get pregnant if she has sex during or near the time of ovulation • Symptoms of pregnancy women may notice: missed menstruation, soreness and enlargement of breasts, nausea, frequent urination and fatigue • As the fetus grows inside the uterus, it stretches and extends above the pelvic bones Impact of nutrition on reproduction • Inadequate nutrition interferes with physical growth – height and weight – of children • Young women who had inadequate nutrition as children may be short in stature, undernourished and have pelvic bones not well developed for pregnancy and childbirth • Under-nutrition can also interfere with reproductive hormones and increase risk of anemia. Women who are undernourished may not have normal menstrual cycles and may have difficulty getting pregnancy and staying healthy during pregnancy. -
Caesarean Section Or Vaginal Delivery in the 21St Century
CAESAREAN SECTION OR VAGINAL DELIVERY IN THE 21ST CENTURY ntil the 20th Century, caesarean fluid embolism. The absolute risk of trans-placentally to the foetus, prepar- section (C/S) was a feared op- death with C/S in high and middle- ing the foetus to adopt its mother’s Ueration. The ubiquitous classical resource settings is between 1/2000 and microbiome. C/S interferes with neonatal uterine incision meant high maternal 1/4000 (2, 3). In subsequent pregnancies, exposure to maternal vaginal and skin mortality from bleeding and future the risk of placenta previa, placenta flora, leading to colonization with other uterine rupture. Even with aseptic surgi- accreta and uterine rupture is increased. environmental microbes and an altered cal technique, sepsis was common and These conditions increase maternal microbiome. Routine antibiotic exposure lethal without antibiotics. The operation mortality and severe maternal morbid- with C/S likely alters this further. was used almost solely to save the life of ity cumulatively with each subsequent Microbial exposure and the stress of a mother in whom vaginal delivery was C/S. This is of particular importance to labour also lead to marked activation extremely dangerous, such as one with women having large families. of immune system markers in the cord placenta previa. Foetal death and the use blood of neonates born vaginally or by of intrauterine foetal destructive proce- Maternal Benefits C/S after labour. These changes are absent dures, which carry their own morbidity, C/S has a modest protective effect against in the cord blood of neonates born by were often preferable to C/S. -
Study Guide Medical Terminology by Thea Liza Batan About the Author
Study Guide Medical Terminology By Thea Liza Batan About the Author Thea Liza Batan earned a Master of Science in Nursing Administration in 2007 from Xavier University in Cincinnati, Ohio. She has worked as a staff nurse, nurse instructor, and level department head. She currently works as a simulation coordinator and a free- lance writer specializing in nursing and healthcare. All terms mentioned in this text that are known to be trademarks or service marks have been appropriately capitalized. Use of a term in this text shouldn’t be regarded as affecting the validity of any trademark or service mark. Copyright © 2017 by Penn Foster, Inc. All rights reserved. No part of the material protected by this copyright may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without permission in writing from the copyright owner. Requests for permission to make copies of any part of the work should be mailed to Copyright Permissions, Penn Foster, 925 Oak Street, Scranton, Pennsylvania 18515. Printed in the United States of America CONTENTS INSTRUCTIONS 1 READING ASSIGNMENTS 3 LESSON 1: THE FUNDAMENTALS OF MEDICAL TERMINOLOGY 5 LESSON 2: DIAGNOSIS, INTERVENTION, AND HUMAN BODY TERMS 28 LESSON 3: MUSCULOSKELETAL, CIRCULATORY, AND RESPIRATORY SYSTEM TERMS 44 LESSON 4: DIGESTIVE, URINARY, AND REPRODUCTIVE SYSTEM TERMS 69 LESSON 5: INTEGUMENTARY, NERVOUS, AND ENDOCRINE S YSTEM TERMS 96 SELF-CHECK ANSWERS 134 © PENN FOSTER, INC. 2017 MEDICAL TERMINOLOGY PAGE III Contents INSTRUCTIONS INTRODUCTION Welcome to your course on medical terminology. You’re taking this course because you’re most likely interested in pursuing a health and science career, which entails proficiencyincommunicatingwithhealthcareprofessionalssuchasphysicians,nurses, or dentists. -
Vocabulary: Sharks
Grades 11-12 - Vocabulary: Sharks Dermal Denticles – Tiny tooth-shaped scales that cover a shark’s body. Dermal Denticles have the same structure as teeth - enamel, dentine, pulp, epidermis, and dermis. Counter Shading - Having a dark dorsal or upper side and a lighter colored underside. Lateral Line – A row of sensors used by sharks and other fish, which detect vibrations. Cartilage – The material that makes up a shark’s skeleton (not bone), and is also found in our ears and nose. Basihyal - A sharks tongue, composed of a small piece of cartilage on the bottom of a sharks’ mouth. Carnivore - An animal that eats meat. Megalodon - An ancient shark that lived between 5 and 1.6 million years ago. Serrated Tooth - A tooth with a jagged edge that is used for sawing. Dorsal Fin - Primary fin located on the back of fishes and certain marine mammals. Pectoral Fins - Either of the anterior pairs of fins. Barbels - Sensory projections near the nostrils and mouth of some sharks, i.e. nurse sharks. They are whisker-like feelers used to taste and feel. Gills - Respiratory organs that fish use to absorb oxygen from the water in order to breathe. Snout - The tip of a shark’s head. Pup - A newly born or hatched shark. Claspers - Two finger like projections on the rear underside of male sharks. Ampullae of Lorenzini - Pores scattered about the head of sharks that are filled with a jellylike substance that can sense temperature change and weak electrical impulses given off by sick prey. Fusiform – A streamlined, oval shape body. -
Glossary of Common MCH Terms and Acronyms
Glossary of Common MCH Terms and Acronyms General Terms and Definitions Term/Acronym Definition Accountable Care Organizations that coordinate and provide the full range of health care services for Organization individuals. The ACA provides incentives for providers who join together to form such ACO organizations and who agree to be accountable for the quality, cost, and overall care of their patients. Adolescence Stage of physical and psychological development that occurs between puberty and adulthood. The age range associated with adolescence includes the teen age years but sometimes includes ages younger than 13 or older than 19 years of age. Antepartum fetal Fetal death occurring before the initiation of labor. death Authorization An act of a legislative body that establishes government programs, defines the scope of programs, and sets a ceiling for how much can be spent on them. Birth defect A structural abnormality present at birth, irrespective of whether the defect is caused by a genetic factor or by prenatal events that are not genetic. Cost Sharing The amount an individual pays for health services above and beyond the cost of the insurance coverage premium. This includes co-pays, co-insurance, and deductibles. Crude birth rate Number of live births per 1000 population in a given year. Birth spacing The time interval from one child’s birth until the next child’s birth. It is generally recommended that at least a two-year interval between births is important for maternal and child health and survival. BMI Body mass index (BMI) is a measure of body weight that takes into account height. -
Onychophorology, the Study of Velvet Worms
Uniciencia Vol. 35(1), pp. 210-230, January-June, 2021 DOI: http://dx.doi.org/10.15359/ru.35-1.13 www.revistas.una.ac.cr/uniciencia E-ISSN: 2215-3470 [email protected] CC: BY-NC-ND Onychophorology, the study of velvet worms, historical trends, landmarks, and researchers from 1826 to 2020 (a literature review) Onicoforología, el estudio de los gusanos de terciopelo, tendencias históricas, hitos e investigadores de 1826 a 2020 (Revisión de la Literatura) Onicoforologia, o estudo dos vermes aveludados, tendências históricas, marcos e pesquisadores de 1826 a 2020 (Revisão da Literatura) Julián Monge-Nájera1 Received: Mar/25/2020 • Accepted: May/18/2020 • Published: Jan/31/2021 Abstract Velvet worms, also known as peripatus or onychophorans, are a phylum of evolutionary importance that has survived all mass extinctions since the Cambrian period. They capture prey with an adhesive net that is formed in a fraction of a second. The first naturalist to formally describe them was Lansdown Guilding (1797-1831), a British priest from the Caribbean island of Saint Vincent. His life is as little known as the history of the field he initiated, Onychophorology. This is the first general history of Onychophorology, which has been divided into half-century periods. The beginning, 1826-1879, was characterized by studies from former students of famous naturalists like Cuvier and von Baer. This generation included Milne-Edwards and Blanchard, and studies were done mostly in France, Britain, and Germany. In the 1880-1929 period, research was concentrated on anatomy, behavior, biogeography, and ecology; and it is in this period when Bouvier published his mammoth monograph. -
A B C Pregnancy Terms and Definitions
Pregnancy Terms and Definitions Obstetrics & Gynecology A After pains or afterbirth pains: Contractions of the uterus that occur after your baby is born, as the uterus returns to its normal size. This may cause cramping for a few days, especially if this is not your first baby or if you are nursing. Amniocentesis: the removal of a sample of amniotic fluid by means of a needle inserted through the mother’s abdominal wall; used for genetic and biochemical analysis of the baby. Amniotic fluid: the liquid surrounding and protecting the baby within the amniotic sac throughout pregnancy. Amniotic sac: the membrane within the uterus that contains the baby and the amniotic fluid. Analgesic: Medication that relieves or reduces pain. Anesthesia: Loss of feeling. There are three ways of doing this: general, local and epidural. Anesthesiologist: A doctor who specializes in the use of anesthesia. Anesthetist: A registered nurse who has special training in anesthesia. Apgar score rating: A system to evaluate the health of your baby immediately after birth. The score can be zero to 10, based on appearance and color, pulse, reflexes, activity and respiration. B Baby blues: A mild depression many women feel in the first few weeks after birth. Braxton-Hicks contractions: Mild, usually painless contractions that occur during the entire pregnancy, but are only felt from the 5th month on. Breech birth: Baby is born feet or buttocks first. C Cephalopelvic disproprition (CPD): Baby’s head is too large for the mother’s pelvic bones. Cervix: the neck of the uterus; Pap smears are taken from the cervix. -
Post-Partum Hysterectomy (Removal of the Uterus/Womb After Giving Birth)
Post-partum hysterectomy (removal of the uterus/womb after giving birth) This leaflet explains what happens when a woman needs a post-partum hysterectomy following complications during giving birth. It explains why and how it is done, and what to expect afterwards. If there is anything you do not understand or if you have any questions, please speak to your midwife or doctor. What is post-partum hysterectomy? This is an operation that involves removal of the uterus (womb). This is an uncommon situation in the UK, with around 1 in 1000 women having this procedure done shortly after childbirth in this hospital, as there is a range of treatments used before such surgery which can save both future fertility and the mother’s life. It may be performed in an emergency to save the life of a woman with persistent bleeding after childbirth. Less frequently, it can be a planned procedure, often at the same time as Caesarean birth. Why is it performed? The most common reason is severe bleeding from the uterus that cannot be controlled by other measures. There is a link to Caesarean birth, particularly if the placenta for the most recent baby is both low in the uterus (placenta praevia), and deeply adherent (placenta grows too deeply into the uterine wall, known as placenta percreta or increta), so not separating fully after the birth of the baby. A more common cause of heavy bleeding is ‘uterine atony’, which is the inability of a womb to contract after the birth, as well as large or multiple fibroids and blood clotting problems. -
The Protection of the Human Embryo in Vitro
Strasbourg, 19 June 2003 CDBI-CO-GT3 (2003) 13 STEERING COMMITTEE ON BIOETHICS (CDBI) THE PROTECTION OF THE HUMAN EMBRYO IN VITRO Report by the Working Party on the Protection of the Human Embryo and Fetus (CDBI-CO-GT3) Table of contents I. General introduction on the context and objectives of the report ............................................... 3 II. General concepts............................................................................................................................... 4 A. Biology of development ....................................................................................................................... 4 B. Philosophical views on the “nature” and status of the embryo............................................................ 4 C. The protection of the embryo............................................................................................................... 8 D. Commercialisation of the embryo and its parts ................................................................................... 9 E. The destiny of the embryo ................................................................................................................... 9 F. “Freedom of procreation” and instrumentalisation of women............................................................10 III. In vitro fertilisation (IVF).................................................................................................................. 12 A. Presentation of the procedure ...........................................................................................................12 -
Maternal Gastrointestinal Tract Adaptation to Pregnancy All Topics
2017/7/29 Maternal gastrointestinal tract adaptation to pregnancy - UpToDate Official reprint from UpToDate® www.uptodate.com ©2017 UpToDate® Maternal gastrointestinal tract adaptation to pregnancy Author: Angela Bianco, MD Section Editor: Charles J Lockwood, MD, MHCM Deputy Editor: Kristen Eckler, MD, FACOG All topics are updated as new evidence becomes available and our peer review process is complete. Literature review current through: Jun 2017. | This topic last updated: Mar 14, 2016. INTRODUCTION — Pregnancy has little, if any, effect on gastrointestinal secretion or absorption, but it has a major effect on gastrointestinal motility. Pregnancy-related changes in motility are present throughout the gastrointestinal tract and are related to increased levels of female sex hormones. In addition, the enlarging uterus displaces bowel, which can affect the presentation of disorders such as appendicitis. Knowledge of the gastrointestinal adaptation to pregnancy is necessary for accurate interpretation of laboratory tests, as well as imaging studies in the gravid patient. Maternal gastrointestinal tract changes during pregnancy and common gastrointestinal disorders related to pregnancy will be reviewed here. OROPHARYNX — The mucous membrane lining the oropharynx is responsive to the hormonal changes related to pregnancy. The gingiva is primarily affected, while the teeth, tongue, and salivary glands are spared, although excessive salivation during pregnancy has been described [1]. The effect of pregnancy on the initiation or progression of caries is not clear; pregnancy-related changes in the oral environment (salivary pH, oral flora) or in maternal diet and oral hygiene may increase the risk of caries [2]. (See "The skin, hair, nails, and mucous membranes during pregnancy", section on 'Mucous membranes'.) Taste — Most studies suggest that taste perception changes during pregnancy [3-6].