Patient's question:
No.Doctor's answer:
Based on the last menstrual period, subtract 3 months and add 7 days. For example, if the last period started on October 28th, the due date would be August 5th of the following year. Alternatively, based on the last menstrual period, count 40 weeks starting from the first day of the period. If the day of conception is known, then count 38 weeks from the actual conception date.