Low human chorionic gonadotropin during pregnancy can be treated with fertility preservation, it is recommended that progesterone be supplemented through oral, injectable or vaginal administration to increase the body’s secretion of human chorionic gonadotropin and restore it to the normal range to achieve the efficacy of fertility preservation. Due to the individual differences in the body during pregnancy, there will be differences in the success rate of birth control, the body’s human chorionic gonadotropin will gradually increase in early pregnancy, if the human chorionic gonadotropin increases slowly or does not increase in early pregnancy, it is easy to affect the healthy growth of the fetus, and in serious cases, it will lead to miscarriage. When the body’s progesterone is on the low side, the lack of progesterone can be supplemented by intramuscular injection or oral progesterone, the specific use and dosage need to be formulated in conjunction with the results of the examination, and the use of progesterone needs to be carried out in accordance with the doctor’s instructions for progesterone testing.