After giving birth to a child, why haven't I had a period?

Patient's question:

I have not had my period since having my child, and it has been 8 years now. I have visited the hospital multiple times, including the Fourth Military Medical University Hospital in Xi'an. I took medication which helped, but after stopping the medication, my period stopped again. I don't know how to proceed. Thank you.

Doctor's answer:

Hello: The condition you mentioned is a symptom of amenorrhea. Treatment
1. Oral ethinyl estradiol, 0.25–0.5 mg per dose, once nightly, for 20 days. Repeat after 8–10 days of stopping the medication, for a total of 3 cycles.
2. Intramuscular progesterone, 20 mg per dose, once daily, for 3 days. Withdrawal bleeding may occur 3–7 days after stopping the medication. If the next menstrual period does not arrive on schedule, repeat the injection 1–3 cycles.
3. Oral ethinyl estradiol, 0.25–0.5 mg per dose, once daily, for 20 days. After stopping the medication, inject progesterone 10–20 mg per dose, once daily, for 5 days. Vaginal bleeding may occur 3–7 days after stopping the medication. This can be used for 3 cycles, but attention should be paid to the dosage and timing of medication to avoid menstrual disorders and affect the efficacy.