The physical condition of both partners should be taken into account when conceiving a second child, along with the necessary nutrition and regular maternity check-ups. Before preparing for pregnancy, it is important to know if you have any underlying medical conditions that will affect the fetus. Before getting pregnant, do a good physical examination of both parties, such as blood pressure and blood sugar, thyroid function, sex hormone six, semen routine as well as their own ovarian function, endometrial thickness and so on. Pay attention to physical exercise to strengthen your body. During pregnancy, you should pay attention to regular HCG test to determine whether there is any abnormality. Regular ultrasound examination to observe the development of the fetus. Need to supplement folic acid, pay attention to balanced nutrition, pay attention to protection, avoid the occurrence of disease, do not take drugs that have an impact on fetal development.