Progesterone is a natural progesterone that is secreted very little inside breast milk, so if you take it while breastfeeding, it is okay to take it because this natural progesterone has very little effect on the nursing child. If you want to take progesterone to get your period during breastfeeding, it is not necessary because it will show up as irregular periods during breastfeeding, and some people do not even get their periods. It is possible to take it if you are trying to preserve the fetus for treatment. Therefore, if you want to take progesterone while breastfeeding, you must go to the hospital and let the doctor see what the reason is for taking progesterone, if you need to take it, you can take it for a short period of time, but try not to take it orally for a long time in large quantities.