Last menstrual period: 2012.7.26, menstrual cycle is irregular and always delayed

Patient's question:

B 35+1, the first hospital said the estimated due date is calculated based on the normal menstrual cycle, which is May 3rd, and the fetus is small and malnourished.
The second hospital said the estimated due date should also be pushed back by 15 days, which is May 20th, and the fetus is normal.

Doctor's answer:

When calculating, the entire gestation period of 280 days is used. The specific method is: Due date month = Last menstrual period (LMP) first day month + 9 or -3, Due date day = LMP first day day + 7. In this way, the calculated date is the due date.

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