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Weeks 1-2
No Development -
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
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
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
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
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