Last menstrual period: February 12 — What is the estimated due date?

Under normal circumstances, if the first day of the last menstrual period (LMP) was February 12, the estimated due date (EDD) would be November 19. A detailed explanation follows:

The first day of the last menstrual period was February 12. Using the standard obstetric formula for estimating the due date, the EDD is calculated as November 19 of the same year. Clinically, gestational age is uniformly calculated starting from the first day of the LMP. The calculation method involves adding 9 months to the month of the LMP and adding 7 days to the date. In this case, adding 9 months to February yields November, and adding 7 days to the 12th results in the 19th; thus, the estimated delivery date is November 19. This date represents a theoretical estimation—most deliveries occur within one to two weeks before or after the EDD, which falls within the normal range for spontaneous labor.

Once gestational age is confirmed, it is essential to maintain a regular daily routine, ensure adequate sleep, and follow a nutritionally balanced diet incorporating both animal and plant-based foods to meet increased nutritional requirements during pregnancy. All scheduled prenatal examinations should be completed on time to continuously monitor fetal development. Daily activities should be moderated to avoid excessive physical fatigue, and emotional well-being should be maintained to support a healthy and stable pregnancy.