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. These images reveal all the intricate details of your baby's growth -- from a collection of cells to a full-term newborn. While most women may only receive one or two ultrasounds during pregnancy, which is normal, this slideshow of the 1st trimester of pregnancy gives you a look at each week of development.
Week 8 (6 weeks from conception)
Fetal Size: Length, 0.6 inches; weight, 0.04 ounces.
Fetal Development Milestones: Baby's hands and feet are developing. Fingers are beginning to form, but are still fused together. Elbows and ears taking shape. Baby-to-be's body, arms and legs are getting longer. Small, jerky movements (seen on sonogram).
What You're Seeing: In this image, the embryo is lying on her back with her head to the right of the screen. In this now familiar c-shape, you can see that the baby-to-be's head is becoming larger to accommodate her growing brain. Her brain is divided into three main parts: the forebrain, the midbrain and the hindbrain. As in the previous week, the hindbrain may be seen as a dark area in the back of the embryo's head.