Miraculously, a baby's development in the womb progresses very quickly through three trimesters. Each period of three months is a trimester in the duration of pregnancy. For example, the first three months of a baby's development in the womb is in the 1st Trimester. Click on each of the monthly embryonic developments for an unborn child to see a baby's progress. Amazingly, a baby's heart begins to beat after only three weeks!
Most mothers are now able to see fully see the gender of their baby at this time. Movements are now becoming stronger, and most first-time mothers will start to feel the baby’s kicks and movements in the womb. Learn More