OVER the past few weeks, we’ve been examining each body system in detail. This week and next, we will focus on our final, most vital system: the reproductive system. Our focus this week will be on the ...

Human reproductive cloning is currently the subject of much debate around the world, involving a variety of ethical, religious, societal, scientific, and medical issues. This report from the National ...

Human reproduction exhibits marked temporal variation, with birth rates and conception outcomes fluctuating across the calendar year. These patterns arise from a complex interplay of environmental ...