If a woman is tested for low progesterone after pregnancy, this may be due to ectopic pregnancy, or it may be due to luteal insufficiency, or it may be due to an abnormal quality of the embryo itself. For women who want to have children after pregnancy, it is often necessary to check blood hcg and progesterone to see the growth and development of the embryo. If progesterone is slightly low at this time, it is often considered to be caused by insufficient luteal function of the ovaries, but as long as progesterone is not particularly low and does not cause discomfort such as vaginal bleeding and abdominal pain, no treatment is needed at this time. If the progesterone test indicates that the progesterone is less than 15.9ngng/L, the possibility of ectopic pregnancy should be considered. This is because the fertilized egg is sitting in a place other than the uterine cavity and will grow poorly, which is why the progesterone level is significantly lower than in the uterus. If a woman has been diagnosed with intrauterine pregnancy by ultrasound, but the abdominal pain and vaginal bleeding are caused by low progesterone, the first thing to consider is that it is caused by the woman’s luteal insufficiency or the abnormal quality of the embryo. Since there is no way to diagnose the exact cause, it is often necessary to take progesterone to replenish progesterone and to provide symptomatic fertility treatment.