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In 2009, Zimbabwe adopted voluntary medical male circumcision (VMMC) as an additional method of HIV prevention. The promotion of VMMC has raised a major concern that it might lead to an increase in hi...
Education is positively associated with completed fertility rate (CFR) among men in Nordic countries, but the age patterns of fertility by educational level are poorly documented. Moreover, it is ...
Durham, NC - In a long-term study of interactions between chimpanzees in the famous Gombe National Park in Tanzania, researchers have found that males who consistently bully females tend to father mor...
Choosing between two good things can be tough. When animals must decide between feeding and mating, it can get even trickier. In a discovery that might ring true even for some humans, researchers have...

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