Word: estrogen
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...Abortions were legally practiced during revolutionary times," she said. "The only major innovation has been the estrogen-based birth control pill...
During the menstrual cycle, the blood level of estrogen, a female sex hormone, rises sharply before ovulation, about midway in the cycle, and then drops again before menstruation occurs. In a study of 200 women, Doreen Kimura, a University of Western Ontario psychology professor, found that when levels of estrogen were high, the women showed greater verbal fluency and used their hands more skillfully than when levels were low. In one test of verbal dexterity, the women were asked to say "A box of mixed biscuits in a biscuit mixer" as fast as possible five times. Their average time...
...problems separately. No one is exactly sure what causes these mental conditions, but both physical and psychological explanations have been suggested. "A woman is undergoing a tremendous hormonal upheaval around the time of childbirth," says Nancy Reame, a women's health researcher at the University of Michigan. During pregnancy, estrogen and progesterone increase a thousandfold, then abruptly drop to normal or sometimes below normal after birth, which may precipitate sudden emotional disorders. Breast feeding is also accompanied by major hormonal changes...
Another of the project's tests follows the breakdown of estrogen by allowing doctors to trace low levels of radioactive forms of the hormone molecules through the body. "Athletes destroy estrogen faster than non-athletes, so their bodies are exposed to less" of the hormone, and this may lead to decreased cancer risk, says Barbieri, who has worked with both Frisch and Snow in the past...
...Hopefully, we will be able to understand how estrogen metabolism and fatness work in individual women, and to explain the frequency of ovulation," Snow says of the project...