Vaginal ejaculation many times, still not pregnant, may be due to the following reasons: 1, each time you choose to have sex, are not occurring in the female ovulation, sperm and egg can not meet, combined, so it will not be pregnant; 2, the frequency of coitus is too high, resulting in the sperm quality is not good, also affects the pregnancy; 3, women who have tubal impassability or suffering from ovarian cysts, fibroids, cervical Inflammation of the cervix and other diseases, will also affect the pregnancy; 4, women belong to the uterine cold body, will also make the fertilized egg implantation by a certain impact, resulting in pregnancy failure; 5, women in the coitus or during the coitus to take contraceptive pills, but also may not be pregnant; 6, bad habits, such as excessive weight loss, weight gain, smoking, staying up all night and so on may have an impact on the pregnancy. If you have not been pregnant for more than a year without taking any measures, it is recommended that both men and women go to the hospital for a detailed examination.