If a woman has been taking progesterone for 10 days and has not stopped taking it, the absence of menstruation is a normal pharmacological phenomenon and can be observed after stopping the drug. If you stop taking progesterone for more than 7 days and still do not have a period, you should consider pregnancy or abnormal low estrogen level, combined with other gynecological diseases, etc. It is recommended to go to the hospital for re-examination and targeted treatment. Common causes and treatment 1, normal situation: If you are taking the drug or stop taking the drug for less than 3-7 days, your period may not come, it is recommended to observe for a period of time, if you stop taking the drug for a specified period of time, you need to consult a doctor for examination; 2, pregnancy: before or during taking the drug, you have a normal sexual life and do not take contraceptive measures, if you stop taking the drug for more than 7 days and your period does not come, you should consider the possibility of pregnancy. Possibility. It is recommended to go to the hospital to check the blood HCG, or to buy a pregnancy test to determine whether you are pregnant; 3, premature ovarian failure: mostly related to genetics, immunity, resulting in low estrogen levels, resulting in thin endometrium, progesterone alone can not promote menstruation, the need for combined immunotherapy means or ovarian transplantation; 4, other gynecological diseases: such as the combination of chronic endometritis, endometrium under the stimulation of inflammation The endometrium becomes thin under the stimulation of inflammation, resulting in scanty menstruation or even amenorrhea, often combined with abdominal pain, requiring antibiotics such as amoxicillin, metronidazole and other treatments, uterine fibroids, retrograde infection resulting in the need for simultaneous surgical removal of fibroids. Precautions taking progesterone may cause adverse reactions, such as nausea, vomiting, dizziness, headache, etc. During the taking period, avoid eating greasy and stimulating food and pay attention to proper rest.