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baby weeks 1-2
no development -
baby weeks 3-4
-conception
-zygote
-rapid cell division
- blastocyst -
baby weeks 5-6
- neural tubes close -heart, organs, and bones start to form -develop heart and trunk -arm legs appear -brain develops -eyes and ears form heart continues developing
- baby is about 1/6 inch long
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baby weeks 7-8
-brain and face shape begins growing
-four chamber heart
-lungs for
-fingers and toes form
-ears develop
-lips and nose forms -
baby weeks 10
-head is half the size of baby
-all baby parts present
-eyes, ears, arms, and legs are identifiable
-about 1 1/4 inches long -
baby week 11
-genitals develop
-head is half length of baby
-teeth buds form
-about 2 inches length and weighs 1/3 ounces -
baby week 12
-fingernails grow
-more define profile in face
-intestines are in abdomen
- about 2 1/2 inches long and weighs about 1/2 once -
baby week 14
-baby's sex will become apparent
- baby can swallow and make urine
-about 3 1/2 inches and weighs 1 1/2 ounces -
baby week 16
-baby is moving but mom cannot feel it
- is about 4 1/2 inches long and weighs about 4 ounces -
baby week 18-19
-begins to hear
-digestive system works
-vernix caseosa the baby -
baby weeks 20-21
- regular sleep and walk patterns -all organs -breathing movements occur bu are undeveloped -covered lanugo -may begin to suck thumb
- about 6 1/3 inches and weighs about 11 ounces
-
baby weeks 24
-wrinkly skin , translucent and pinkish red
-lung development
-regular sleep and wake pattern
-about 8 inches and weights about 1 1/3 pounds -
baby weeks 28-29
-eyes begin to partially open and close
-central nervous system directs breathing and body temperature control
-lungs can breath air
-begins to kick and stretch
-about 10 inches and 2 1/4 pounds -
baby weeks 31- 32
-finish major development
-rapid gain in weight
-lanugo starts to fall off
-is about 11 inches in length and 3 3/4 pounds -
baby week 34
-continues to grow fingernails and toenails
- develop breathing motion
-responds to light
-skin is pink and smooth
-about 12 inches and weighs about 4 1/2 pounds -
baby weeks 36-37
-takes up most amniotic sac
-starts to turn head down to prepare for labor
-is about 13 1/2 inches and about 6 pounds
-will continue to grow about 1/2 lbs -
baby weeks 38-40
- brain, lungs, and liver still developing -brain will double the size between weeks 35-39 -lungs develop during last weeks -at week 39 baby is considered full term
- weight gain helps with temperature