Key takeaways
- A pregnancy lasts about 9 months (40 weeks), divided into three trimesters.
- Your baby grows from a poppy seed in month 1 to a watermelon (around 2.8–3.5 kg) by month 9.
- Each month brings new development, new symptoms, and specific scans or tests.
- Open your current month below for baby size, what's developing, your symptoms, tests and warning signs.
One of the most exciting parts of pregnancy is imagining how your baby is growing. This month-by-month guide shows your baby's size (with everyday comparisons), the key developmental milestones, and the symptoms you can expect — from the very first weeks to the final stretch before birth.
As a gynaecologist in Gurugram, these are the questions I'm asked at almost every visit: "How big is my baby now? What's happening this month? Is what I'm feeling normal?" Use the chart and the month pages below to follow along, and always bring your questions to your antenatal visits.