The happy life in the title generally refers to sex life. Generally speaking, you can have sex appropriately when you are four months pregnant. Four months of pregnancy is about 16 weeks pregnant, has entered the middle pregnancy, four months pregnant placenta has been formed, the fetus is also more stable, the maternity examination is not abnormal findings, such as symptoms of preeclampsia, or placenta previa state, can be appropriate to have sex. But in the process of sexual life need to pay attention to the strength of action and position, do not press the pregnant woman’s stomach, the frequency can not be too frequent, and the intensity is not too intense. After sex, pregnant women should do a good job of cleaning the vulva, and if you have sex, there are symptoms of discomfort, you should consult a doctor in a timely manner. During pregnancy, you should do regular pregnancy checkups, balanced nutrition, you can do appropriate exercise, but should avoid strenuous exercise.