A month after stopping breastfeeding and still no menstruation should first be tested for pregnancy, removing the possibility of pregnancy, which may also be normal. You can first observe until 3 months after weaning, if menstruation has not resumed, you should go to the hospital for ultrasound and sex hormone level examination.
Although there is usually no menstruation after delivery and breastfeeding, it does not mean that the ovarian function has not recovered and there is no ovulation, and normal sexual intercourse without contraception may lead to another pregnancy.
If there is no pregnancy and no other discomforts, you can continue to observe, because the return of menstruation after the cessation of breastfeeding varies greatly from individual to individual, and it is normal for it not to come for a while.
If your period does not return for more than 3 months after weaning, you should go to the hospital.