How is the pregnant due date calculated with iui. is it based on last mens cycle or the date when iui is done?i had iui on 8march hw many weeks am i preg?

Pregnancy dating: The estimated due date is always calculated from the first day of the last menstrual period. This computes to a 40 week gestation. The date of the IUI is roughly comparable to the date of conception. Your march 8th IUI would correspond to the week of pregnancy calculated from your last menstural period.

Last period: Unless you are doing ivf, your due date is calculated based in the first day of your last period, and adjusted as needed by on ultrasound measurements.