It is definitely good to have menstruation on time every month because the onset of menstruation in women is influenced by the endocrine secretion in the body, especially by the estrogen and progesterone secreted by the ovaries. The fact that menstruation is on time every month means that the patient’s menstrual cycle is 30 days, which means that the hormone secretion in the body is normal. After the endometrium is shed, it will be affected by the hormones secreted by the ovaries in the body and will undergo changes of proliferation and secretion. If the endocrine secretion is not normal, it will cause the menstruation to not come on time, so it is very good that the menstruation comes on time every month, which means that the ovaries are functioning normally.