Low sperm vigor in men has no effect on pregnancy. Low sperm motility does not mean that the sperm are abnormal, it just means that there is an overall lower percentage of sperm motility, a lower overall percentage, and a lot of very good motility sperm. As long as there is a pregnancy, it means that it is very good vigor sperm that competes to combine with the egg. The fact that there is a pregnancy in this situation indicates that this sperm has very good vigor and is also the most competitive sperm. Therefore, there is no effect on the fetus after pregnancy. The occurrence of fetal malformations is more often associated with infections such as rubella virus that result from pregnancy, or the effects of radiation. Low sperm motility has no effect on pregnancy, and it is recommended to continue the fertility preservation treatment.