This is also in here as a disclaimer. Although I myself have so far had good experiences with trying to conceive while breastfeeding so far, I am not saying that breastfeeding during pregnancy is perfectly safe for every woman and has no health risks. Only your doctor / midwife or team of health care professionals can tell you what is safe and best in your situation. I am also not saying all of the things listed below will happen to you. Low Progesterone While Breastfeeding Breastfeeding can sometimes causes low levels of progesterone. For some women who do become pregnant while breastfeeding, they can have low progesterone levels that may require them to take medicine. Your doctor should be able to tell you if you have low levels during your pregnancy. If you are concerned, go for a blood test after getting a positive home pregnancy test. I have also heard that sometimes breastfeeding causing low progesterone levels can lead to miscarriage and mostly these miscarria...