My Baby's Growth
Fetal development - month 3
First trimester
At the end of 12 weeks:
- Baby is 2-1/2 to 3 inches long.
- Weight is about 1/2 to 1 ounce.
- Baby develops recognizable form.
- Nails start to develop and earlobes are formed.
- Arms, hands, fingers, legs, feet and toes are fully formed.
- Eyes are almost fully developed.
- Baby has developed most organs and tissues.
- Baby's heart rate can be heard at 10 weeks with a special instrument called a Doppler.

