Pregnancy development

Curious about how your baby is developing in the womb? Here's a breakdown of fetal development week by week.

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The first 12 weeks of pregnancy is the most crucial part; knowing what’s expected of you in the first trimester and the baby development

A complete week-by-week pregnancy guide. Details on how baby is growing, what pregnancy symptoms mama can expect and how to relieve them as well as weekly to-do list to ensure you are ready for baby's arrival

Pregnancy calendar

A typical pregnancy lasts 40 weeks from the first day of your last menstrual period (LMP) to the birth of the baby. It is divided into three stages, called trimesters: first trimester, second trimester, and third trimester. The fetus undergoes many changes throughout maturation. Conception to about the 12th week of pregnancy marks the first trimester. The second trimester is weeks 13 to 27, and the third trimester starts about 28 weeks and lasts until birth.

See our pregnancy weeks to months chart, find out how long a trimester is, and learn how to calculate your due date.