If gastrointestinal reactions, such as nausea and vomiting, are still present in the early stages of pregnancy, they can overwhelmingly indicate that the fetus is developing well in utero and that the HCG level is increasing. However, this does not mean that the progesterone is normal, so if there is pain in the lower abdomen or vaginal bleeding, it is recommended to have not only a blood HCG test, but also a progesterone test to see if the progesterone is normal. In case of low progesterone, clinical intervention is required. It is recommended that progesterone supplementation should be given in time to improve the symptoms.