5. By the end of your pregnancy your blood volume increases by 50%
By the end of your pregnancy, your blood volume will have increased by 50 percent… so you actually gain about 4 pounds of blood! This is why it’s so easy to become anemic during pregnancy and that’s why you’re said to ‘glow.’
6. Babies pee in the uterus, then drink it
From the second trimester onwards, babies pee in the uterus.. and then they drink it. In fact amniotic fluid is mostly sterile pee.
Source: Baby Centre