World Sex Records The Biggest, Longest, Sexiest, Tallest, Smallest, Shortest, Highest, Lowest, Fastest, Slowest, Rarest, Oldest, Youngest, Happiest, First, Last, Maximum, Minimum, Largest, Oddest...

Looking for a "hot" date? Something naughtier? ABC Fantasy Dating Hot videos, DVDs? All tastes, and streaming video! Try Adult Videos & DVDs World Sex News On nudity, pornography Erotica, Orgasms, Lesbians Click here

First study of hormonal influence on sexual development Four researchers at the University of Kansas (Phoenix, Goy, Gerall, and Young) performed in 1959 a break-through series of experiments on guinea pigs. Earlier work had shown that when male hormones are administered to pregnant female guinea pigs, the female offspring are anatomically masculinized - born with penises and scrotums. And some experiments had shown that when female guinea pigs are spayed and later given male hormones they display only a limited amount of malelike sexual behaviour. Phoenix et al combined the two types of experiments. Pregnant female guinea pigs were given androgens. The ovaries of the masculinized female pups were removed after birth and at maturity androgens were administered. The females behaved much like males. Brecher has termed this the Phoenix-Goy-Young effect. From The Illustrated Book of Sexual Records. © 1974, 1982, 1997-2001 G.L. Simons Back to Home Page Other Categories   Human Physiology     Sexual Techniques and Peformance   The Arts Abberant Sex and Deviations Animals and plants Contraception and Castration Sexology Prudery, Superstition and the Law Looking for a "hot" date? Something naughtier? ABC Fantasy Dating Hot videos, DVDs? All tastes, and streaming video! Try Adult Videos & DVDs World Sex News On nudity, pornography Erotica, Orgasms, Lesbians Click here See Also World Sex News Erotic Awards Sex Maniacs Ball Sexual Freedom Coalition Encyclopedia of Unusual Sex Practices Catastrophism!

Search: Sexology First liberal sexologist in modern Times Most comprehensive 19th century study Earliest sexological surveys Most famous sexologist Most comprehensive survey [i] First female sexologist Countries least active in sex research First sex institute Most celebrated sex institute First effective scientific observation of human coitus Most orgasms observed in research Earliest empirical study of orgasm in U.S. First detailed account of orgasmic response Most ambitious studies of female orgasmic capacity Earliest sexual activity survey by age Most thorough study of female orgasm Largest pre-Kinsey study group First statistically based study First measurement of coital heart rate Smallest pre-Kinsey study Oldest sexist dialogue on women First study to question women Largest U.K. survey on women Most bizarre marriage prerequisite Most thorough sexo-anthropological surveys Most thorough pre-Masters masturbation study Most important British homosexuality report Most detailed pornography study Least impressive pornography survey First reading of detailed paper on sexual response [i] First study of psychosexual disorders Syphilis first noted First country to abolish syphilis Most popular sex-experiment animal Erection first experimentally induced Hormones first discovered First study of hormonal influence on sexual development First sex educator