The weeks of birth of a twin-chorion twin-sheep twin-fetus depends on the presence or absence of comorbidities during pregnancy, and without comorbidities it can be as late as 38-39 weeks, and if there are any remaining abnormalities, they should be handled on an individualized basis. For no symptoms of labor, pregnant women and fetus are in good condition, and there are no other pregnancy complications, comorbidities, such as hypertensive disorders of pregnancy, gestational diabetes mellitus, cholestasis in pregnancy, premature rupture of membranes and other illnesses, you can expect to terminate the pregnancy until the 38th week of gestation, and not later than the 39th week of gestation, and the mode of delivery will be decided by the obstetrician after a comprehensive assessment. With the development of assisted reproductive technology, twin pregnancies are gradually increasing. As a high-risk factor during pregnancy, twin pregnancies should be closely examined during pregnancy and the number of checkups should be increased as appropriate, so that any abnormalities can be handled in a timely manner.