Last menstrual period was April 28. What is the due date?

Under normal circumstances, if the last menstrual period was on April 28, the expected delivery date should be around February 5 of the following year, which can be calculated using a standard formula. The details are as follows:

To calculate the due date based on the last menstrual period, subtract 3 from or add 9 to the month of the last menstrual period, and add 7 days to the day of the last menstrual period. Delivery occurring up to two weeks before or after the calculated due date is considered normal. If the date of the last menstrual period is uncertain, an ultrasound examination performed by a qualified medical professional, or assessment of placental maturity near term, may be used to estimate the due date.

If a pregnant woman experiences vaginal bleeding, abdominal pain, or rupture of membranes (water breaking) during the expected delivery period, this may indicate imminent labor, and she should promptly go to the hospital for delivery.