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Age And Female Fertility
Female fertility is affected by age and is a major fertility factor for women. A woman's fertility peaks between the late teens and late-20s, after which it starts to decline slowly. While many sources suggest a more dramatic drop at around 35, this is unclear, since few studies have been conducted since the 19th century. One 2004 study of European women found fertility of the 27–34 and the 35–39 groups had only a four-percent difference. At age 45, a woman starting to try to conceive will have no live birth in 50–80 percent of cases. Menopause, or the cessation of menstrual periods, generally occurs in the 40s and 50s and marks the cessation of fertility, although age-related infertility can occur before then. The relationship between age and female fertility is sometimes referred to as a woman's "biological clock." Quantification of effect The average age of a young woman's first period (menarche) is 12 to 13 (12.5 years in the United States, 12.72 in Canada, 12.9 in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fertility
Fertility is the capability to produce offspring through reproduction following the onset of sexual maturity. The fertility rate is the average number of children born by a female during her lifetime and is quantified demographically. Fertility is addressed when there is a difficulty or an inability to reproduce naturally, which is referred to as infertility. Infertility is widespread, with fertility specialists available all over the world to assist mothers and couples who experience difficulties having a baby. Human fertility depends on factors of nutrition, sexual behaviour, consanguinity, culture, instinct, endocrinology, timing, economics, personality, way of life, and emotions. Fertility differs from fecundity, which is defined as the ''potential'' for reproduction (influenced by gamete production, fertilization and carrying a pregnancy to term). Where a woman or the lack of fertility is infertility while a lack of fecundity would be called sterility. Demography I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Female Reproductive Biomarkers
Female infertility refers to infertility in women. It affects an estimated 48 million women, with the highest prevalence of infertility affecting women in South Asia, Sub-Saharan Africa, North Africa/Middle East, and Central/Eastern Europe and Central Asia. Infertility is caused by many sources, including nutrition, diseases, and other malformations of the uterus. Infertility affects women from around the world, and the cultural and social stigma surrounding it varies. Cause Causes or factors of female infertility can basically be classified regarding whether they are acquired or genetic, or strictly by location. Although factors of female infertility can be classified as either acquired or genetic, female infertility is usually more or less a combination of nature and nurture. Also, the presence of any single risk factor of female infertility (such as smoking, mentioned further below) does not necessarily cause infertility, and even if a woman is definitely infertile, the inf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ovarian Follicle
An ovarian follicle is a roughly spheroid cellular aggregation set found in the ovaries. It secretes hormones that influence stages of the menstrual cycle. At the time of puberty, women have approximately 200,000 to 300,000 follicles, each with the potential to release an egg cell (ovum) at ovulation for fertilization. These eggs are developed once every menstrual cycle with around 450–500 being ovulated during a woman's reproductive lifetime. Structure Ovarian follicles are the basic units of female reproductive biology. Each of them contains a single oocyte (immature ovum or egg cell). These structures are periodically initiated to grow and develop, culminating in ovulation of usually a single competent oocyte in humans. They also consist of granulosa cells and theca of follicle. Oocyte Once a month, one of the ovaries releases a mature egg (ovum), known as an oocyte. The nucleus of such an oocyte is called a '' germinal vesicle (see picture).'' Cumulus oophorus Cumulu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family Planning
Family planning is the consideration of the number of children a person wishes to have, including the choice to have no children, and the age at which they wish to have them. Things that may play a role on family planning decisions include marital situation, career or work considerations, financial situations. If sexually active, family planning may involve the use of contraception and other techniques to control the timing of reproduction. Family planning has been of practice since the 16th century by the people of Djenné in West Africa, when physicians advised women to space their births at three-year intervals. Others aspects of family planning aside from contraception include sex education, prevention and management of sexually transmitted infections, pre-conception counseling and management, and infertility management.World Health Organization. (n.d.)Sexual and Reproductive Health Retrieved on 30 October 2019. Family planning, as defined by the United Nations and the World ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hutterite
Hutterites (german: link=no, Hutterer), also called Hutterian Brethren (German: ), are a communal ethnoreligious group, ethnoreligious branch of Anabaptism, Anabaptists, who, like the Amish and Mennonites, trace their roots to the Radical Reformation of the early 16th century and have formed intentional communities. The founder of the Hutterites, Jacob Hutter, "established the Hutterite colonies on the basis of the Schleitheim Confession, a classic Anabaptist statement of faith" of 1527, and the first communes were formed in 1528. Since the death of Hutter in 1536, the beliefs of the Hutterites, especially those espousing a community of goods and nonresistance, have resulted in hundreds of years of diaspora in many countries. The Hutterites embarked on a series of migrations through central and eastern Europe. Nearly extinct by the 18th century, they migrated to Russian Empire, Russia in 1770 and about a hundred years later to North America. Over the course of 140 years, their p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Bongaarts
John P. M. Bongaarts (born 1945) is a Dutch-American demographer. He serves as Vice-President and Distinguished Scholar at the Population Council, where he has worked since the 1970s. Bongaart has performed research in a diverse set of topics, such as population growth and aging, mortality, population-environment links and demography related to the epidemiology of HIV/AIDS. His most recognized work lies in the field of fertility, and has been a topic of interest throughout his career. Career Bongaarts was born in Tegelen, the Netherlands, in 1945. He obtained a degree in electrical engineering from Eindhoven University of Technology in 1968. Bongaarts subsequently moved to the United States where he studied physiology and biomedical engineering at the University of Illinois and obtained his PhD in 1972, with a dissertation titled: "A Cybernetic Model of the Demographic Transition". He subsequently was a postdoctoral fellow at Johns Hopkins University. He started working as associ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural Fertility
Natural fertility is the fertility that exists without birth control. The control is the number of children birthed to the parents and is modified as the number of children reaches the maximum. There is evidence that little birth control is used in non-European countries. Natural fertility tends to decrease as a society modernizes. Women in a pre-modernized society typically have given birth to a large number of children by the time they are 50 years old, while women in post-modernized society only bear a small number by the same age. However, during modernization natural fertility rises, before family planning is practiced. Historical populations have traditionally honored the idea of natural fertility by displaying fertility symbols. Birth control Natural fertility is a concept developed by the French historical demographer Louis Henry to refer to the level of fertility that would prevail in a population that makes no conscious effort to limit, regulate, or control fertility, so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endometrioma
Endometrioma is the presence of tissue similar to, but distinct from, the endometrium in and sometimes on the ovary. It is the most common form of endometriosis. Endometrioma is found in 17–44% patients with endometriosis. More broadly, endometriosis is the presence of tissue similar to, but distinct from, endometrial tissue located outside the uterus. The presence of endometriosis can result in the formation of scar tissue, adhesions and an inflammatory reaction. It usually is a benign growth. An endometrioma is most often found in the ovary. This ovarian endometriosis forms dark, fluid-filled cysts. These fluid-filled sacs can vary greatly in size and are known as endometriomas, also called "chocolate cysts". The fluid inside the cysts is thick, dark, old blood, giving it a chocolate-like appearance. It can also develop in the cul-de-sac (the space behind the uterus), the surface of the uterus, and between the vagina and rectum. Pathophysiology Endometrial tissue is the mucous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American College Of Obstetricians And Gynecologists
The American College of Obstetricians and Gynecologists (ACOG) is a professional association of physicians specializing in obstetrics and gynecology in the United States. Several Latin American countries are also represented within Districts of the organization. It is a 501(c)(3) organization with a membership of more than 60,000 obstetrician-gynecologists and women's health care professionals. It was founded in 1951. __TOC__ Background A companion 501(c)(6) organization, the American ''Congress'' of Obstetricians and Gynecologists, was founded in 2008 and became operational in 2010. The two organizations coexist, and member individuals automatically belong to both. Both are not-for-profit. The College as a 501(c)(3) focuses on education (with limited political work), whereas the Congress as a 501(c)(6) is allowed to advocate for members' interests in terms of the business of medicine (BOM) through lobbying and other political work. Their main advocacy focuses on women's reprod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vaginal Ultrasonography
Vaginal ultrasonography is a medical ultrasonography that applies an ultrasound transducer (or "probe") in the vagina to visualize organs within the pelvic cavity. It is also called transvaginal ultrasonography because the ultrasound waves go ''across'' the vaginal wall to study tissues beyond it. Uses Vaginal ultrasonography is used both as a means of gynecologic ultrasonography and obstetric ultrasonography. It is preferred over abdominal ultrasonography in the diagnosis of ectopic pregnancy. See also * Gynecologic ultrasonography Gynecologic ultrasonography or gynecologic sonography refers to the application of medical ultrasonography to the female pelvic organs (specifically the uterus, the ovaries, and the fallopian tubes) as well as the bladder, the adnexa, and the rec ... References External links * Medical ultrasonography {{medical-equipment-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anti-Müllerian Hormone
Anti-Müllerian hormone (AMH), also known as Müllerian-inhibiting hormone (MIH), is a glycoprotein hormone structurally related to inhibin and activin from the transforming growth factor beta superfamily, whose key roles are in growth differentiation and folliculogenesis. In humans, it is encoded by the gene, on chromosome 19p13.3, while its receptor is encoded by the gene on chromosome 12. AMH is activated by SOX9 in the Sertoli cells of the male fetus. Its expression inhibits the development of the female reproductive tract, or Müllerian ducts (paramesonephric ducts), in the male embryo, thereby arresting the development of fallopian tubes, uterus, and upper vagina. ''AMH'' expression is critical to sex differentiation at a specific time during fetal development, and appears to be tightly regulated by nuclear receptor SF-1, transcription GATA factors, sex-reversal gene DAX1, and follicle-stimulating hormone (FSH). Mutations in both the ''AMH'' gene and the type II AMH r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
