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 11 (9 weeks from conception)
Fetal Size: Length, 1.61 inches; weight, 0.25 ounces.
Fetal Development Milestones: Chin and neck are developing. Facial features are becoming more defined. Baby's ears move higher on the head.
What You're Seeing: Baby-to-be is lying on her back with her head on the left side of the image and her legs pointing up. From this image, you can see that her neck is growing, separating her large head from the rest of her body. Her head still makes up more than 50% of her body size, which is normal. Facial bones are again seen as bright white areas in the profile.