What is the reason for the delay in pregnancy?

No pregnancy also does not come menstruation, occasionally a problem is not big, menstruation ahead or wrong within a week belongs to normal. If the test is not pregnant, and menstruation delayed more than a week does not come. Special worry can go to the hospital to do color ultrasound, see endometrial thickness can judge about menstrual cramps time. The formation of this situation, generally and tension, pressure is particularly closely related. Some people stay up late because of this period of time, often rest is not good performance endocrine disorders will also cause menstruation delayed occurrence, so there is no pregnancy also do not come menstruation general problem is not big. Often show menstruation should not be allowed to the hospital to do related examinations, the first is to do gynecological color ultrasound, see uterus, ovary has no organic disease caused menstruation does not come.