Baby development

Pregnancy Breakdown

  • Month 1

    Month 1
    ~Size: At two weeks the size of 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
    ~The heart starts to beat
  • Month 2

    Month 2
    ~Size: About 1/4 inches (6 MM) long as month begins.
    ~Face,eyes, ears, and limbs take shapes
    ~Bones begins to form
  • Month 3

    Month 3
    ~Size: About 1 inch (25 mm) long as month begins.
    ~Nostrils, mouth, lips, and eyelids form
    ~Buds for all 20 baby teeth appear
    ~Fingers and toes almost complete
    ~ All organs present but still immature
  • Month 4

    Month 4
    ~Size: About 3 inches (7.6 cm) long, weighs 1 ounce (28 g) as month begins
    ~Can suck its thumb, swallow, hiccups, and move around
    ~Facial features become clearer
  • Month 5

    Month 5
    ~Size: About 6 1'2-7 inches (16-18 cm) long, weighs about 4-5 ounces (113-142 g) as month begins.
    ~Hair, eyelashes, and eyebrows appear
    ~Teeth continue to develop
    ~ Organs are maturing
    ~becomes more active
  • Month 6

    Month 6
    ~Size: About 8-10 inches (21-25 cm) long, weighs about 8-12 ounces (227-340 g) as month begins.
    ~fat deposits under skin, but fetus appears wrinkled
    ~Breathing movements begin
  • Month 7

    Month 7
    ~Size: About 10-12 inches (25-31 cm) long, weighs about 1 1/2 pounds (690-907 g) as month begins.
    ~Has periods of activity followed by periods of rest and quiet
  • Month 8

    Month 8
    ~Size: about 14-16 ounce (36-41 cm) long, weighs about 2 1/2-3 pounds (1.0-1.4 kg) as month begins.
    ~Rapid weight gain continues
    ~May react to loud noises with a reflex jerking action
    ~Moves into a head-down position
  • Month 9

    Month 9
    ~Size: About 17-18 inches (43-46 cm) long, weighs about 5-6 pounds (2,3-2.7 kg) as month begins
    ~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