Fetal development 37 weeks after conception
By the 39th week of pregnancy, or 37 weeks after conception, your baby is considered full term.
Forty weeks into pregnancy, or 38 weeks after conception, your baby might have a crown-to-rump length of around 14 inches (360 millimeters) and weigh about 7 1/2 pounds (3,400 grams). But remember that healthy babies come in lots of sizes.
Don't be worried if your due date comes and goes with no signs of labor starting. The due date is simply an estimate of when your pregnancy will be 40 weeks along. It doesn't predict exactly when your baby will arrive. Many people give birth before or after their due dates.