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Period: to
Weeks 1-2
None -
Period: to
Weeks 3-4
-Conception
-Rapid cell division begins
-Zygote turns into a blastocyst and travels down the fallopian tube -
Weeks 5-6
-Heart, organs, and bones start to form
-Eyes and ears begin to form
-Body is 1/6 inch long -
Period: to
Weeks 7-8
-Lungs begin to form
-Fingers and toes start to form
-Baby is about 1/2 inch long -
Period: to
Week 10
-All body parts are present
-Head is half the size of the body
-Body is 1 1/4 inches long -
Week 11
-Teeth buds form
-Genitals develop
-Baby is about 2 inches in length and about 1/3 ounce -
Period: to
Week 12
-Fingernails grow
-Face has a more defined profile
-About 2 1/2 inches in length and weighs about 1/2 ounce -
Period: to
Week 14
-Baby's sex will become apparent
-Baby can swallow and make urine
-Baby is about 3 1/2 inches in length and weighs about 1 1/2 ounces -
Week 16
-Baby is moving but mom can't feel it
-Baby is about 4 1/2 inches in length
-Baby weighs about 4 ounces -
Period: to
Weeks 18-19
-Baby begins to hear
-Digestive system begins to work
-Vernix casease covers the baby -
Period: to
Weeks 20-21
-Regular sleep and wake-up patterns
-All organs and structures formed
-Baby is about 6 1/3 inches in length and weighs about 11 ounces -
Week 22
-Has nails, fingerprints, eyebrows, lashes, and possibly some hair
- Heartbeat heart with a stethoscope
-Baby is about 7 1/2 inches in length and weighs about 1 pound -
Period: to
Week 24
-Wrinkly skin, translucent and pinkish red
-Lung development
-Baby is about 8 inches in length and weighs about 1 1/3 pounds -
Period: to
Weeks 28-29
-Baby begins to kick and stretch
-Eyes begin to partially open and close
-About 10 inches in length an weighs about 2 1/4 pounds -
Weeks 31-32
-Finished most major development
-Rapid weight gain begins
-Baby is about 11 inches in length and weighs about 3 3/4 pounds -
Week 34
-Responds to light
-Skin is pink and smooth
-Baby is about 12 inches in length and weighs about 4 -
Weeks 36-37
-Starts to turn head down to prepare for labor
-Takes up most of the amniotic sac
-Baby is about 13 1/2 inches in length and weighs about 6 pounds -
Weeks 38-40
-At week 39, the baby is considered full term
-Weight gain helps with temperature control once the baby is born
-Lung development during the last few weeks helps with fewer complications after birth