The external genitals start out as several small bulges that form between your baby's legs at 4 to 5 weeks of pregnancy. Around the same time, the internal sex organs are forming from a ridge of ...

Your baby’s brain is one of the first major organs to start developing. Learn more about fetal brain development and what ...

During the fetal stage, a number of so-called cell programs run that are vital to the development of the fetus. Researchers demonstrate that one of these fetal programs appears to protect against ...

Lab-grown “reductionist replicas” of the human brain are helping scientists understand fetal development and cognitive ...

Previous research has shown that infections during pregnancy may increase the risk of neurodevelopmental diseases in ...

Wisconsin Republican state Rep. Joel Kitchens tried to establish his human fetal development bona fides by noting that he has performed ultrasounds on animals. Speaking in the House chamber on ...