Women’s menstruation did not come, appearing abdominal distension: a. It may be due to the lowering of hormone levels in women’s bodies when they are about to menstruate, the pelvic blood circulation slows down and leads to abdominal distension, a small number of women will appear is a normal biological phenomenon. When the menstrual period comes after the flow of blood, abdominal distension will be relieved. Second, may be women have a normal sex life, did not take contraceptive measures caused by the discomfort of pregnancy. Three, do not exclude women during this period to eat cold food or cold stimulation and lead to lower abdominal distension, when women do not come to menstruation, appear small abdominal distension and pain, pay attention to proper rest, pay attention to warmth, do not eat cold food, after treatment can not be relieved, the best blood test blood HCG for diagnosis, is more clear.