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Articles on Embryo

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The characteristic hammer-shaped head is just becoming visible in this image of an embryonic bonnethead shark. Scale bar = 1 cm. Steven Byrum and Gareth Fraser, Department of Biology, University of Florida

Rare access to hammerhead shark embryos reveals secrets of its unique head development

Because hammerhead sharks give birth to live young, studying their embryonic development is much more complicated than harvesting some eggs and watching them develop in real time.
Louise Brown, who was the world’s first baby to be born from in vitro fertilization (IVF) in 1978, poses with equipment used in early IVF treatments. Daniel Leal-Olivas/ Getty

The fertility industry is poorly regulated – and would-be parents can lose out on having children as a result

An unknown number of people have lost their dreams of parenthood because of storage disasters at fertility clinics. These experts note poor government oversight and the need for stronger regulation.
Getting the job done. A female Asian water dragon (Physignathus cocincinus) produced a daughter (left) without the assistance of a male. Skip Brown/Smithsonian’s National Zoo

Virgin births from parthenogenesis: How females from some species can reproduce without males

Parthenogenesis, a form of reproduction in which an egg develops into an embryo without being fertilized by sperm, might be more common than you realized.
Men have nipples because of a quirk in how embryos develop. But that’s only part of the story of this seemingly redundant body part. from www.shutterstock.com

Why do men have nipples?

How embryos develop, evolution and sexual pleasure all help explain why men have nipples. But ‘man boobs’ are a different story.
When it comes to reproduction, couple have more choices than ever before. Chinnapong/Shutterstock.com

What the ban on gene-edited babies means for family planning

A ban on clinical trials involving gene editing rules out the controversial procedure done in China. But it also prevents procedures that could offer couples a chance for healthy children without genetic disorders.

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