Low sperm vitality can lead to difficulties in conception, but only to reduce the chances of pregnancy, the sperm of conception are relatively healthy, with the vitality of the dominant sperm, deformed or poor vitality of the sperm can not reach the fallopian tube part and the combination of the egg, the sperm vitality of low men, as long as the woman is pregnant after the fetus should not be affected. Low sperm vitality does not rule out the case of malformed sperm leading to conception, which may cause the embryo to stop developing or preeclampsia and so on, so after the conception of the pregnant woman must pay attention to the pregnant woman do not overwork, avoid staying up all night, do not have coitus in the early stages of pregnancy, you can be guided by a doctor to take oral folic acid and vitamins for a good regular maternity check. Although low sperm vitality may be pregnant, it is recommended to consult a doctor in time to find out the cause of the symptomatic treatment, to avoid leading to infertility.