Patient's question:
Medical Description: My last menstrual period was on the fourth day of the first lunar month this year. Can you help me calculate when I might give birth to my baby? Medical History and Effectiveness: I often have prenatal check-ups. What kind of help do I need: I want to get a professional doctor's answer.Doctor's answer:
The entire pregnancy lasts for 280 days, approximately 40 weeks, or 10 gestational months (in medicine, each gestational month is 28 days). Since it is difficult for every pregnant woman to accurately determine the time of conception, medicine that the estimated due date is calculated from the first day of the last menstrual period. The calculation method is to subtract 3 months or add 9 months to the first day of the last menstrual period, and add 7 days to the date. For example, if your last menstrual period was on February 10, then adding 9 months to the month gives November, and adding 7 days to the date gives 17, so your estimated due date would be November 17. However, some women have irregular menstrual cycles or do not remember the date of their last menstrual period, so doctors usually estimate the gestational age through ultrasound and then calculate the estimated due date.