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    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.