From single cell to human fetus: a detailed look at your baby’s first three months
| July 8th, 2008 | First Trimester Development | Dr. Doubilet & Dr. Benson |
The first trimester is the most amazing three-month period in biology. What begins as a single cell (the fertilized egg) will become a tiny fetus with all of the baby’s internal organs in place and recognizable human features in just 13 short weeks. Here’s a look at your baby’s development in the first trimester:
Just the Facts:
• At five weeks, your pregnancy will be visible on ultrasound.
• At six weeks, the regular flicker of a heartbeat is first visible on ultrasound.
• By the end of the first trimester the baby’s body proportions have changed to become similar to those of a newborn.
The first trimester is the most amazing three-month period in biology. What begins as a single cell (the fertilized egg) will become a tiny fetus with all of the baby’s internal organs in place and recognizable human features in just 13 short weeks. Here’s a look at your baby’s development in the first trimester: