reproduction, developmental biology

A phthalate commonly found in shampoos, cosmetics, and cleaning products disrupts reproduction in worms.

In a species of freshwater turtle, embryos can move toward warmer or cooler environments within the egg and thus help choose their sexual destiny, but not all experts are convinced.

The extremely rare event, thought to be caused by two sperm cells fertilizing the same egg simultaneously, was last reported in 2007.

A small study based on circulating RNA in the blood of moms-to-be describes a technique that could be used to help predict who’s most at risk of preterm labor.

Researchers find that boas and pythons use an XY sex chromosome system, rather than the previously assumed ZW system found in some other snakes.

A new culture system allows researchers to track the development of human embryos in vitro for nearly two weeks.

Mouse offspring conceived by in vitro fertilization are metabolically different from naturally conceived mice.