How can I still have my period when I am pregnant?

Generally speaking, a woman's menstruation will stop after she becomes pregnant, but some women will still have their menstruation during pregnancy. So, how can you still have your period when you are pregnant?

Reason 1: Fertilized egg implantation is unstable

[General situation]: Menstruation is the bleeding phenomenon caused by the necrosis and shedding of the endometrium after ovulation. In a sense, menstruation is the female uterus preparing for pregnancy. Under normal circumstances, if the fertilized egg successfully implants into the endometrium, the woman will not ovulate, and this kind of preparation will no longer be necessary. Therefore, menstruation will generally stop during pregnancy.

[Special circumstances]: Because the fertilized egg implantation is not stable, the placenta has not formed, and it is close to or on the day of menstruation, a mature egg will still be discharged and then discharged from the body along with the shedding of the endometrium, causing a small number of pregnant women to think they are having their "menstruation".

Reason 2: Endometrial shedding

[General situation]: After a woman becomes pregnant, her ovaries will secrete a large amount of progesterone, estrogen, etc. to promote the thickening of the endometrium, thereby providing a fertile "soil" for the implantation and growth of the fertilized egg. At this time, as the levels of estrogen and progesterone in women's bodies continue to increase, the endometrium will no longer shed, and women will no longer have menstruation.

[Special circumstances]: Due to individual differences and other reasons, some women's ovaries secrete relatively low levels of sex hormones, especially progesterone, after pregnancy, causing a small part of the endometrium to continue to shed. Therefore, these women will still have menstruation after pregnancy, but the amount of menstruation will be much less than normal. It is not until three months into pregnancy that the placenta is formed and the estrogen and progesterone levels in the female body are maintained at a relatively high level. At this time, the endometrium no longer sheds and menstruation no longer occurs.