Postpartum hemorrhage is more bleeding than normal after the birth of a baby. About 1 in 100 to 5 in 100 women have postpartum hemorrhage. It is more likely with a cesarean birth. It most often happens after the placenta is delivered, but it can also happen later.
Postpartum thyroiditis happens when a person's thyroid becomes inflamed after delivering a baby, or having a miscarriage or abortion. It may first cause your thyroid to be overactive. But over time it leads to an underactive thyroid. This affects a small percentage of pregnant people.
Detailed information on breastfeeding and mastitis