Fetal Development

  • Month 2

    Size: 1/4 inch
    Face, eyes, ears, and limbs take
    Bones begin to form
  • Month 1

    Size: A pin head
    Egg attaches to lining of uterus
    Critical stage for brain and spinal cord development
    Internal organs and circulatory system begin to form
    Heart begins to beat
  • Month 3

    Size: 1 inch
    Nostrils, mouth, lips, eyelids form
    Buds for all 20 baby teeth appear
    Fingers and toes almost complete
    All organs present but still immature
  • Month 4

    Size:3 inches
    Weight : 1 ounces
    Can suck on thumb, swallow, hiccup, and move around
    Facial features become more clear
  • Month 5

    Size: 6 1/2 - 7 inches
    Weight: 4-5 ounces
    Hair, eyelashes, and eyebrows
    Teeth would continue to develop
    Organs are maturing
    Becomes more active
  • Month 6

    Size: 8-10 inches
    Weight : 8- 12 ounces
    Fat deposits under skin, but fetus appears wrinkled
    Breathing movements begin
  • Month 7

    Size : 10-12 inches
    Weight : 1 1/2 - 2 pounds
    Periods of activity followed by periods of rest and quiet
  • Month 8

    Size: 14-16 inches
    Weight: 2 1/2 - 3 pounds
    Rapid weight gain continues
    May react to loud noises and a reflex jerking action
    Moves into a head-down position
  • Month 9

    Size: 17- 18 inches
    Weight gain continues
    Skin becomes smooth as fat deposits continue
    Movements decrease as the fetus has less room to move around
    Acquires disease-fighting antibodies from the mother's blood
    Descends into pelvis, ready for birth