Prenatal Development

By S.T.S
  • Weeks 1-2

    Weeks 1-2

    No Development
  • Weeks 3-4

    Weeks 3-4

    Conception Starts to happen Zygote turns into blastocyst and travels down the fallopian tube Rapid cell division begins

  • Weeks 5-6

    Body begins to form Arms and limbs begin to take shape Baby is 1/6 inches in height

  • Weeks 7-9

    The brain and face start growing Fingers and toes start to form All major organs formed Baby is about 1/2 inches long
  • Week 10

    Week 10

    The head is half the size of the baby All body parts are present Baby is 1 1/4 inches in length

  • Week 11

    Head is about half the length of the baby Teeth buds form Baby is about 2 inches in length

  • Week 12

    Fingernails grow Face has more defined profile Intestines fully grown Weighs 1/2 ounce

  • Week 14

    Babys gender is now apparent Baby is 3 1/2 inches in length
  • Week 16

    Week 16

    The baby is now moving around but the mother cannot feel it Baby is 4 1/2 inches in length

  • Week 18-19

    Baby begins to hear Digestive system works Vernix caseosa covers the baby

  • Weeks 20-21

    Regular sleep and wake patterns All organs and structures formed Baby is about 6 1/3 inches in length
  • Week 22

    Week 22

    Babies are more active Heartbeat can now be heard with stethoscope Baby is about 7 1/2 inches in length

  • Week 24

    Lung development Regular sleep and wake patterns Baby is about 8 inches in length
  • Weeks 28-29

    Weeks 28-29

    Eyes begin to partially open and close Lungs are fully functional Baby begins to kick and stretch

  • Weeks 31-32

    Finished major organ development Rapid weight gain begins for the baby

  • Week 34

    Developed breathing motions Responds to light The baby is about 12 inches in length and weighs 4 pounds

  • Week 36-37

    The baby takes of most of the amonatic sac Starts to turn head upside down to prepare for labor

  • Week 38-40

    Brain, Lungs, and Liver still developing Baby is considered full term