According to a new study, chimpanzees, like humans, must contend with a confined bony birth canal when giving birth. In humans, the problem was exacerbated by our unique form of upright walking since ...

Before 36 weeks of pregnancy, you don’t need to worry about the position of the fetus in the womb upside down or breech . This is because the baby will continue to move and rotate in your stomach. The ...

3D simulation of the birth canal of chimpanzees with (B) the fetal head in a fully extended position, the typical head alignment in apes, and (C) the fetal head in a fully flexed position, the usual ...