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The US Senate is reviewing a bill that would extend a ban on so-called three-parent embryos.


image: FDA Considers Three-Parent IVF

FDA Considers Three-Parent IVF

By | October 17, 2013

The US regulatory agency will meet next week to discuss whether to allow human trials of a technique that combines the genetic information of three adults.


image: X Marks the Spot for Sperm Production

X Marks the Spot for Sperm Production

By | July 21, 2013

A new genetic analysis suggests the human X chromosome evolves rapidly and plays a specialized role in sperm production.


In Chapter 3, “From Mating to Conception,” author Robert Martin explores the question of why humans and other primates frequently engage in sexual intercourse when females are not fertile.


image: Widening the Fertile Window

Widening the Fertile Window

By | July 1, 2013

Women may be able to store viable sperm for longer than a week, thus contributing to apparent variability in pregnancy lengths.

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