Kissing during pregnancy may cause contractions. Pregnant women should pay attention to rest more during pregnancy, avoid strenuous exercise, and also pay attention to try to avoid factors that are easy to cause contractions, such as coitus, etc., which may lead to the possibility of preterm miscarriage or preterm labor. During kissing, the hormones in a woman’s body will be secreted more, which may reflexively cause uterine contractions. But pregnant women do not need to be too nervous, not kissing will necessarily lead to contractions cause adverse consequences. Pregnant women should pay attention to regular maternity checkups during pregnancy, especially to pay attention to do a good job every time the examination of malformation, at any time to find the problem at any time to deal with. Usually also need to pay attention to more nutrition, pay attention to the balanced diet. Maintain a happy mood, do not have too much psychological pressure, if at any time there are special discomfort such as abdominal pain, abnormal vaginal bleeding, etc. to seek medical attention as soon as possible.