Title: Fetal development timeline | BabyCenter
Headings: Fetal development timeline
Fetal development timeline
IN THIS ARTICLE
First trimester
Second trimester
Third trimester
Karisa Ding

Content: He's moving quite a bit now, but you won't feel it. He's about 5/8 of an inch long and weighs hardly anything – four-hundredths of an ounce. 9 weeks
Eyes have developed, though your baby's eyelids are fused shut for now. She's lost her "tail" and is starting to look more human. 10 weeks
The embryo has become a fetus. His vital organs – such as kidneys, intestines, brain, and liver – are starting to function. Tiny fingernails and toenails are starting to form. 11 weeks
Your baby is almost fully formed. Her bones are beginning to harden, and her genitalia are developing externally. She can hiccup, though it's too soon for you to feel it.