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FertilityFertility is the ability of people or animals to produce healthy offspring in abundance, and of the earth to bear fruit. Human fertility depends on factors of nutrition, sexual behavior, culture, instinct, endocrinology, timing, economics, way of life, and emotions. Both women and men have hormonal cycles which determine both when a woman can achieve pregnancy and when a man is most fertile. The female cycle is approximately twenty-eight days long, but the male cycle is variable. Women ovulate at about the fourteenth day of their cycle, this obviously being the most fertile time for females. Men can ejaculate and produce sperm at any time of the month, but their libido dips occasionally, which may be in relation to an internal cycle. Women's fertility peaks in their early twenties, and often deteriorates after 30. Related Science NewsEncyclopedia ArticlesStudy Of Normal Women Demonstrates: There Are Few "Safe" Days In Menstrual Cycle (November 17, 2000) -- Guidelines for getting pregnant -- or avoiding pregnancy -- usually assume an average woman is fertile between days 10 and 17 of her menstrual cycle. But researchers at the National Institute of ... > full story It's All In The Timing (October 12, 2005) -- Couples who use fertility awareness-based methods of family planning have sex just as often as couples who use other contraceptive methods -- they just time it differently, according to a new ... > full story Natural Family Planning Method As Effective As Contraceptive Pill, New Research Finds (February 21, 2007) -- Researchers have found that a method of natural family planning that uses two indicators to identify the fertile phase in a woman's menstrual cycle is as effective as the contraceptive pill for ... > full story Scientists Find Simple Way Of Identifying The Likeliest Days To Conceive (October 26, 2001) -- A simple way of establishing on which days in a woman's menstrual cycle she is fertile has been identified by US and Italian fertility experts, according to research published in Europe's leading ... > full story New Natural Method Of Family Planning Over 95% Effective In Preventing Pregnancy, Study Finds (June 11, 2002) -- The Standard Days Method (TM), a new natural method of family planning, is more than 95% effective at preventing pregnancy, according to an international study conducted by Georgetown University ... > full story Too Much Weight Spells Double Trouble For Couples Trying To Conceive (March 7, 2007) -- If both partners in a couple are overweight or obese, they are more likely to have to wait longer before successfully conceiving a child, according to new research published online in Europe's ... > full story Male Rivalry Increases When Females At Most Fertile, Say Researchers (April 26, 2006) -- Men become more jealous of dominant males when their female partner is near ovulation, researchers at the University of Liverpool have ... > full story Forget Basal Body Temperature -- Check Out Her Clothes; Signs Of Ovulation May Be More Obvious Than Supposed (October 13, 2006) -- Near ovulation, women dress to impress, and the closer women come to ovulation, the more attention they seem to pay to their appearance, suggests a new UCLA and University of Wisconsin-Eau Claire ... > full story Soy Likely Doesn't Affect Fertility, According To Research In Monkeys (October 20, 2004) -- New research shows that the plant estrogens in soy don't impair fertility in monkeys. The study was designed to test a theory that high-soy diets can compromise fertility in ... > full story Aging Brain Reduces Ovulation (October 13, 2003) -- Dutch researcher Annelieke Franke has discovered that the aging of the brain adversely affects the fertility of female rats. The scientist suspects that her research will provide insights into ... > full story
Fertility -- Fertility is the ability of people or animals to produce healthy offspring in abundance, and of the earth to bear fruit. Human fertility depends on factors of nutrition, sexual behavior, culture, ... > full article Infertility -- Infertility is the inability to naturally conceive a child or the inability to carry a pregnancy to term. There are many reasons why a couple may not be able to conceive, or may not be able to ... > full article Hinny -- A hinny is the offspring of a male horse and a female donkey (jennet or jenny). They are rarer than mules, which are the offspring of a male donkey (jackass or jack) and a female horse. Like the ... > full article Menopause -- Menopause (also known as the "Change of life" or climacteric) is a stage of the human female reproductive cycle that occurs as the ovaries stop producing estrogen, causing the reproductive system to ... > full article Menstrual cycle -- The menstrual cycle is the set of recurring physiological changes in a female's body that are under the control of the reproductive hormone system and necessary for reproduction. In women, menstrual ... > full article Orgasm -- An orgasm also known as a sexual climax, is a pleasurable physical, psychological or emotional response to prolonged sexual ... > full article Hysterectomy -- A hysterectomy is the surgical removal of the uterus, usually done by a gynecologist. Hysterectomy may be total (removing the body and cervix of the uterus) or partial (also called ... > full article Sexual dysfunction -- Sexual dysfunction or sexual malfunction is difficulty during any stage of the sexual ... > full article Oral contraceptive -- Oral contraceptives are chemicals taken by mouth to inhibit normal fertility. All act on the hormonal system. Female oral contraceptives, colloquially known as the Pill, are the most common form of ... > full article Fertilisation -- Fertilisation, also spelt fertilization (also known as conception, fecundation and syngamy), is fusion of gametes to form a new organism of the same species. In animals, the process involves a sperm ... > full article This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Fertility". View this article at Wikipedia.org - Edit this article at Wikipedia.org. Wikipedia articles are exempt from any compilation copyright held by this site or the editor, as specified on the Wikipedia:Copyrights page. Please note that the Wikipedia copyright and related information apply only to Wikipedia articles -- i.e., those that ScienceDaily explicitly links to on the Wikipedia web site. Any other materials on this page or elsewhere on the ScienceDaily web site are protected by applicable copyright law by their respective owners. See our copyright page for more details. New! Search Science Daily or the entire web with Google: |
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