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...some women's health advocates say that evidence isn't strong enough, calling for further study and a national, trackable registry of egg donors. While the Centers for Disease Control and Prevention (CDC) logs the number of donated eggs transferred to infertile women each year - there were some 15,500 in 2006, the most recent year for which data are available - no one knows how many individual donors those eggs came from, who they were or whether they were exceeding industry guidelines of six donations in a lifetime. (The guidelines are intended to limit the number of offspring from...
...paper offers new insight into an evolutionary conundrum posited in 1986 by Daniel Vining Jr. of the University of Pennsylvania in the journal Behavioral and Brain Sciences. Vining pointed out that in contemporary societies, rich couples have the same number (and often fewer) kids than poor ones. The article suggested that human reproductive behavior was entirely learned, not inherited...
Today's moguls, then, differ only in degree from the prolific breeders of the past, such as Moulay Ismail the Bloodthirsty, Emperor of Morocco, who produced at least 700 sons (people stopped counting after that) and an untold number of daughters before he died in the early 17th century. One big reason today's powerful men don't have as many kids as they could is a relatively new invention that our reproductive instincts haven't had time to adapt to: contraception. (See pictures of classic stars' families at LIFE.com...
...conservative number of admitted students means that it should be another good year for wait-listed students, said Fitzsimmons...
...combat AIDS, which emphasized fidelity and mutual monogamy. According to Green, fewer people had more than one partner in the previous year and the prevalence of HIV has decreased. Swaziland and Botswana, the two countries that have the highest infection rates are now instituting similar programs. But a number of Green’s colleagues do not completely agree with his conclusions. “Right now condoms are the most effective means we have available for preventing the spread of HIV,” said Abdoulaye Dieng Sarr, a senior research scientist at the Harvard School of Public Health...