SPECIAL OFFER: - Limited Time Only!
(The ad below will not display on your printed page)

First Trimester: Images of Your Developing Baby

Do you know what to expect in the first trimester of pregnancy? We've partnered with the American Institute of Ultrasound Medicine (AIUM), Johns Hopkins, and the March of Dimes to create this unique peak into Baby's development inside the womb during the first trimester. These images reveal all the intricate details of your baby's growth. While most women normally receive one or two ultrasounds during pregnancy, this slideshow of the first trimester of pregnancy gives you a look at each week of development.
Week 6 Week 6 of Pregnancy

Fetal Size: 1/6 to 1/4 of an inch.

Fetal Development Milestones: There's a measureable heartbeat.

What You're Seeing: Here, the sonographer demonstrates the developing baby's heartbeat. The top part of the image shows placement of a measuring tool on the ultrasound machine called an M-mode through the image of the beating heart. This tool shows movement over time, which is displayed on the bottom part of the image. The image on the bottom shows how the baby's heart rate is calculated.