> Their accounting is from end of last period though so the actual pregnancy will usually be a couple of weeks shorter along. All pregnancies are dated are fro

> Their accounting is from end of last period though so the actual pregnancy will usually be a couple of weeks shorter along. All pregnancies are dated are from the date of the last period, there is no other standard in US/Canada: https://kidshealth.org/en/parents/week1.html https://kidshealth.org/en/parents/week1.html