Making Boys
February, 2007
pi_ayiriG FauoRiTes with "me wea«eR sexBoys are sensitive souls, especially when they're inside a woman. More males are conceived than females, but fewer survive, so the natural gender ratio at birth hovers around one to one. Scientists haue long wondered what forces could cause that ratio to shift. Do women manipulate sperm or reject embryos to produce more sons in times of plenty and more daughters in times of want, since females are more likely to live past puberty and will have an easi...
