A woman who has two dominant follicles and is pregnant is more likely to have a twin pregnancy if two follicles are expelled at the same time, which is more likely, and a twin pregnancy is a high risk pregnancy. During the development of the fetus is prone to preterm delivery, should be regular prenatal checkups, strengthen nutrition, pay attention to rest, under normal circumstances women have only one dominant follicle developing in each menstrual cycle, having two dominant follicles does not guarantee equal advantage at the same time, there may also be one child. After pregnancy, women should go to the hospital for blood tests to check blood HCG. If there is a twin pregnancy, blood HCG should be significantly elevated and ultrasound examination can confirm the diagnosis of singleton or twin pregnancy, prohibit sexual intercourse in early pregnancy and take oral folic acid to prevent fetal neural tube development malformation.