Progesterone is very good for regulating menstruation, helping pregnancy and for preserving the fetus, but there are some side effects associated with its use in large quantities. Progesterone is important for women, it is secreted by the corpus luteum of the ovaries, has a regulatory effect and is important throughout pregnancy. If there is a lack of progesterone in the body, it can easily lead to irregular periods or even amenorrhea, which is not good for pregnancy preparation, so progesterone supplementation is needed to regulate menstruation to help pregnancy. If there is a lack of progesterone during pregnancy, it is easy to cause a preterm miscarriage, when progesterone is needed to fill the uterus with blood and produce a placenta, so it can play a very good role in preserving the pregnancy. Although progesterone is beneficial to the body, it is not used freely. If you use a lot of progesterone on your own in early pregnancy, it is likely to lead to fetal malformations, and a lot of progesterone use will make the fetus show female characteristics, which is not good for male fetal development.