When you're 6 weeks pregnant, however, the heart isn't fully developed.For this reason, the American College of Obstetrics and Gynecologists (ACOG) defines the fluttering of cells in the embryonic ...

A baby girl who developed a life-threatening brain condition was successfully treated before she was born—and is now a healthy seven-week-old.

The concentration of lactate, pyruvate, and hydrogen ions, and the CO2 tension was greater in the umbilical circulation than in the uterine circulation during the period prior to hypoxia.