Pregnancy is typically measured from the first day of your last menstrual period (LMP), not from the date of conception. Using this method, pregnancy usually lasts about 40 weeks (or 280 days) from the start of your last period
. Here are key points about how many weeks you are pregnant:
- Pregnancy is counted starting at Week 0 on the first day of your last period, progressing up to Week 40, which is the estimated due date (EDD)
- A full-term pregnancy generally lasts between 37 and 42 weeks
- The due date is an estimate; most babies are born a little before or after 40 weeks
- If you want to know exactly how many weeks pregnant you are now, you count the weeks from the first day of your last period to the current date
- Ultrasound scans, usually done around 12 weeks, can provide a more accurate estimate of how far along you are
In summary, you are considered pregnant for about 40 weeks, starting from the first day of your last menstrual period, with the actual length varying between 37 and 42 weeks depending on individual factors
