How many months of pregnancy will the baby be born

Patient's question:

No

Doctor's answer:

If calculated based on the normal 30-31 days per month in daily life, then it would be giving birth after 9 months of pregnancy. You didn't have your period on May 19 and only found out you were pregnant then, so your last menstrual period should be April 19, right? Based on this, if your due date is calculated from the last menstrual period of April 19, it would be January 26, 2011. The specific date can be cross-referenced with the ultrasound results to determine the due date.