A sibling can change your life — potentially even before birth. The sex of one fetus can affect its neighbors in the womb. The "intrauterine position effect" was first discovered in cattle farming. A ...

Every womb is a battlefield. There’s a tug of war happening whenever a fetus is developing, as the baby needs nutrients from the mother to grow. But the mother needs enough nutrients in her system for ...

Using alcohol, tobacco, marijuana or other substances during pregnancy can harm the developing fetus, even when the risks are not always obvious, a West Virginia University psychiatrist warns. "Many ...

Researchers at the University of Colorado Anschutz Medical Campus have found that vaping nicotine during pregnancy may be no safer for a developing fetus than smoking cigarettes. The study suggests ...

Using marijuana during pregnancy is linked to poor fetal development, low infant birth weight, dangerously early deliveries and even death, according to a new meta-analysis of research. “The most ...

Scientists have uncovered a new quality control system that removes damaged cells from early developing embryos. Scientists studying gene activity data of the early human embryo have discovered an ...