Patient's question:
NoDoctor's answer:
The calculation of due date is related to the last menstrual period. There is no causal relationship between the regular advancement of menstruation and the advancement of delivery time. Generally, from the start of the last menstrual period to the due date is 40 weeks of pregnancy. Pregnancy between 37 weeks and 42 weeks is considered full-term delivery and does not fall under the category of postterm or preterm labor.