The absence of menstruation in pregnancy is the result of metaplasia-like changes in the lining of the uterus, and there will be no shedding of the lining of the uterus, causing the absence of menstruation.
As menstruation is associated with shedding of the uterine lining, the unfertilized dead egg is shed along with the uterine lining. After pregnancy, the fertilized egg is successfully deposited in the uterus, and the endometrium undergoes metaplasia-like changes to protect the fertilized egg and prepare it for growth and development. At this time, the ovaries will not ovulate again, and the endometrium will not shed, so when you are pregnant, you won’t have menstruation.
When the ovaries do not have cyclic estrogen and progesterone secretion after pregnancy, there will be no cyclic changes in the uterus and no cyclic shedding, so you won’t have menstruation during pregnancy.
When you are pregnant, you should eat properly, do not overwork, and have your maternity checkups on time.