By the beginning of the 10th week of pregnancy, all of your baby's vital organs have formed.
His embryonic tail, located at the bottom of his spinal cord, has disappeared.
His bones continue to develop. On an ultrasound, your baby's bones appear white.
At 10 weeks pregnant, his ears get close to their final form.
His teeth buds emerge, and his eyelids develop further.
His testes start producing the male hormone testosterone around the 10th week of pregnancy.
Tiny fingers and toes are fully separated (no more webbing).
Plus, your baby's brain growth really takes off. Every minute, 250,000 new neurons (or first brain cells) are produced.