In the case of black menstruation and low volume, it is possible for a woman to get pregnant, but the chance of pregnancy may be reduced. 1, when a woman’s endometrium develops normally during ovulation, after having sex during ovulation, the egg and sperm can be combined to form a fertilized egg and transplanted into the uterine cavity, which can be normally bedded and grow and develop, and the ovaries can normally secrete HCG and progesterone, the fetus will generally develop well. 2. If the endometrium is thin due to low menstrual flow, when the fertilized egg is formed and transplanted into the uterine cavity, the nutrients in the endometrium are not sufficient, which can easily lead to poor embryo implantation and biochemical pregnancy, pre-eclampsia or even spontaneous abortion. Therefore, when a woman finds that her menstruation is black and low in volume, she can increase nutrition and exercise to promote normal menstruation and endocrine secretion, which will help the growth and development of the endometrium and increase the pregnancy rate.