In fact, for women, in calculating and waiting for the expected date of birth should not be too obsessed, because it is not much different from when you are not pregnant every month to wait for menstruation, but also with your usual dating and waiting for your boyfriend a little bit similar (except that pre-marriage dating basically you are late, the boyfriend is early, after the wedding will be out of control, there is the phenomenon of your early husband late), basically in the appointment of that The ones who are really on time are fewer still. The same goes for due dates, only about 5% of pregnant women actually deliver on their due date. There are many ways to calculate the due date, but the most commonly used method is the one proposed by Dr. Naegele in Germany at the beginning of the 19th century. This method is based on the assumption that the menstrual cycle lasts 28 days and that the entire pregnancy lasts 280 days (40 weeks). According to this method, about 5% of women give birth on their 40-week due date, about 25% give birth three days before or after their due date, about 50-60% give birth one week before or after their due date, and about 80% give birth two weeks before or after their due date. Another 20% are delivered before 38 weeks and after 42 weeks. According to the current method of calculation, the due date is a point, in fact, in the opinion of the obstetrician, the due date should be more of a surface, as long as the child is normal, the delivery of any day between 37-42 weeks is considered normal. Because the due date is in accordance with the menstrual cycle for 28 days of the “standard human” calculation, and does not take into account the age, birth, menstrual cycle, ethnicity and other differences, even if it is all taken into account, the time of delivery will still be different, so the due date is not yet born, there is no need to obsess. What should I do if I’m not in labor by my due date? Listen to the doctor, continue to do what you should do, pay attention to every day carefully count the fetal movement, if necessary, do fetal heart monitoring and ultrasound, nothing to do more walking, walking, walking will be born. What should I do if I’m still in labor at 41 weeks? Usually the doctor will make a judgment for you, if you meet the conditions for a normal delivery, most of them will ask you to be hospitalized to prepare to help you give birth, if the cervix is not in good condition, you will use drugs or other methods to promote cervical ripening, and if the cervix is in good condition, they will be prepared to induce labor for you. In general, we do not want to delay labor beyond 42 weeks of gestation because the risk of adverse perinatal outcomes increases beyond that. Having a baby is like having fruit on a tree, when it’s ripe it will fall off, it doesn’t matter when it will fall off, but if it’s ripe for a long time and doesn’t fall off, what do you do? Go pick it (induce labor).