For parents who are preparing to have a second child, I think it is important not to blindly believe in natural conception. It is recommended to first consider the following issues clearly 1. The impact of previous pregnancies on this one should not be underestimated. (1) the risk of ectopic pregnancy is significantly higher after tubal reopening, and timely consultation is needed if there is abdominal pain and bleeding after another pregnancy; (2) adhesions in the uterine cavity may result after IUD removal, making repeated failure of implantation, manifested by low menstrual flow and thin endometrium, at which time hysteroscopy and treatment should be considered; (3) cesarean section of the first child may lead to incisional pregnancy at the scar in the case of another pregnancy, which is very dangerous; (4) advanced age may cause more complications after pregnancy, such as gestational diabetes, hypertension, etc., and need to monitor blood sugar and blood pressure before pregnancy; (5) thyroid disease is gradually increasing in recent years, manifesting as low or hyperthyroidism, and need to check thyroid function before pregnancy; 2. Whether the physical state of both parties is suitable. Such as whether both parties have recently taken medication, whether there are various acute infectious diseases, for patients with chronic diseases who have been taking medication for a long time, they must go to a specialist after consultation, and the dosage of medication is reduced to the lowest suitable for pregnancy. For women with IUDs, it is best to wait until all indicators of physical examination are OK before considering removing the IUD. 3. Pregnancy preparation tests. For women, ovulation monitoring and more than two ultrasounds are required; for men, semen examination is required. 4. age. for women over 35 years old, fertility declines steeply, and it is necessary to go to the hospital to check the condition of the endometrium and the fallopian tubes after about six months of trying to conceive.