Is pregnancy 9 or 10 months?

I used to be so confused by this too! It is 9 calendar months, but because doctors calculate from the first day of your last period, it comes to 40 weeks, which feels like 10 months. So both are technically right in their own way.

My doctor explained that calendar months are usually 30 or 31 days, so 40 weeks of pregnancy actually equals 9.2 calendar months. Since 4 weeks make 28 days, counting strictly in 4-week blocks makes it look like 10 lunar months. That is why the confusion happens.

It is officially 40 weeks, which is about 9 calendar months. Doctors track it by weeks to be precise.

We always calculate it as 40 weeks from the LMP (last menstrual period). In clinical terms, a full term is anywhere between 37 and 42 weeks, which spans across 9 calendar months. Just follow your EDD on the ultrasound reports.

Honestly, by the time you reach the final stretch, it feels like 100 months! But mathematically it is 40 weeks. Just count the weeks and keep packing that hospital bag, because the days fly by anyway.