Unlike most mammals, human beings are biologically designed to have one child per pregnancy. How do multiple births of twins or octuplets occur? Unlike most mammals, human beings are biologically ...
The advent of fertility treatments has led to an increase in the rate of multiple births in the United States. However, the trends in and magnitude of the contribution of fertility treatments to the ...
THE many difficulties of studying the effect of season upon birth-rate (or conception-rate) have been listed in Huntington's recent book “Season of Birth”. Factors such as birth control, a popular ...
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