Zika virus and pregnancy Zika infection during pregnancy can cause a birth defect called microcephaly and other brain problems. Learn how to protect yourself from Zika.
Rh disease RH factor is a protein on some people's red blood cells. Learn how RH disease affects your baby and how to prevent it.
Amniotic fluid Amniotic fluid is the fluid surrounding your baby in your uterus. Learn how amniotic fluid keeps your baby healthy.