fertility behavior

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• Fertility awareness — Background Birth control type Behavioral First use 1950s (mucus) mid 1930s (BBT) 1930 (Knaus Ogino) Ancient (ad hoc) Failure rates (first year) Perfect use Symptoms based: 1 3% Calendar based: 5 9% …   Wikipedia

• Fertility — is the natural capability of giving life. As a measure, Fertility Rate is the number of children born per couple, person or population. This is different from fecundity, which is defined as the potential for reproduction (influenced by gamete… …   Wikipedia

• Race, Evolution, and Behavior — Race, Evolution, and Behavior: A Life History Perspective is a controversial book written by J. Philippe Rushton, a professor of psychology at the University of Western Ontario, and the current head of the Pioneer fund. Rushton argues that race… …   Wikipedia

• Homosexual behavior in animals — For homosexuality in humans, see homosexuality. Homosexual behavior in animals refers to the documented evidence of homosexual and bisexual behavior in non human species. Such behaviors include sex, courtship, affection, pair bonding, and… …   Wikipedia

• Digit ratio — Not to be confused with Benford s law about the frequencies of leading digits of numbers. Hand with index finger being shorter than the ring finger, resulting in a small 2D:4D ratio, pointing to a high exposure to testosterone in the uterus. The… …   Wikipedia

• David Shapiro (economist) — This page refers to David Shapiro, the economist. For others with this name, please see David Shapiro. David Shapiro David Shapiro is an American economist at the Pennsylvania State University. He joined the Penn State faculty[1] in 1980. He is a …   Wikipedia

• FAMILY, AMERICAN JEWISH — Introduction Any discussion of American Jewish family life as an institution must view it within the context of contemporary American social, economic, and political life. All contemporary American Jews are Jews by choice in that their… …   Encyclopedia of Judaism

• fertile — 01. The land at the mouth of a river is usually very [fertile] because of all the minerals deposited there by the water. 02. The [fertile] countryside of this country is famous for its grapes, which are made into the finest wine. 03. Children… …   Grammatical examples in English

• Whipple's index — Respondents to a census or other surveys sometimes inaccurately report their or other household members age or date of birth. Whipple s index (index of concentration) is applied to detect the extent to which age data show systematic heaping on… …   Wikipedia

• Fingerlängenverhältnis — Ein kleines 2D:4D korreliert mit einem relativ hohen fetalen Testosteronspiegel. Fingerlängenverhältnis bezeichnet das Verhältnis der Länge des Zeigefingers zur Länge des Ringfingers und wird daher auch 2D:4D (d für digit, engl. für Finger)… …   Deutsch Wikipedia

• Bisphenol A — Bisphenol A IUPAC name …   Wikipedia