Human childbirth is commonly viewed as uniquely difficult and dangerous. The reason: The combination of bipedalism and large brains creates a tight fit between the baby and the birth canal. Research ...

Research led by Dr. Kirsty Macleod from Bangor University's School of Environmental and Natural Sciences found that lizards whose mothers experienced stress during pregnancy grew more slowly and ...

That includes humans, many monkeys, ungulates such as deer and antelope, and elephants. In these animals, a large fetus can improve survival after birth, but it also raises the odds of a dangerous ...