During pregnancy, most parents-to-be will be due to the baby safety issues, a large reduction in sex, especially in the first trimester of pregnancy and a month before delivery, other times should also be moderate, masturbation should also be moderate, excessive masturbation on the baby and pregnant women is a certain harm, as follows: 1, excessive sexual excitement generated by masturbation will cause strong contractions of the uterus can cause serious miscarriage, premature births occur. 2, masturbation such as not pay attention to hygiene, coupled with the secretion of hormones during pregnancy, it is easy to cause bacteria, pathogens, induced intrauterine infection, affecting the health of pregnant women and the growth and development of the fetus, serious can lead to the occurrence of miscarriage. 3, excessive masturbation masturbation, can make the pregnant woman’s body fatigue, physical deterioration, to the mother-to-be body burden, poor resistance, easy to catch a cold, etc., is not conducive to the growth and development of the baby. Proper masturbation generally has no effect, but the hazards associated with excessive masturbation must be taken seriously. It can lead to miscarriage, premature birth, and is not conducive to the safety of the pregnant woman herself and the growth and development of her baby. It is recommended that the mother-to-be avoid excessive masturbation for the safety of her baby.