Weak spermatozoa pregnancy can be, weak spermatozoa pregnancy on the fetus is generally no effect. Weak spermatozoa refers to low sperm motility, the number of sperm moving forward will be reduced, but weak spermatozoa will only affect the chances of successful conception, after normal pregnancy is generally no effect on the fetus. Spermatozoa with weak spermatozoa generally have reduced forward motility and limited ability to move forward and combine with the egg, making conception more difficult. However, once a pregnancy is achieved, the normal development of the embryo will not be affected. Most of the main causes of embryo development are chromosomal abnormalities, immune factors and so on. Weak spermatozoa can easily lead to male infertility, and it is recommended to seek timely medical treatment to avoid delaying the condition.