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Period: to
Weeks 1-2
-there are no developments of the baby yet -
Week 3-4
-conception
-2ygote turns into blactocyst and travels down the fallcpain tube
-rapid cell division begins
blastocyst implants in uterus lining during week 4 and becomes an embryo -
Period: to
Weeks 5-6
-neural tube closes; brain and spinal cord will form
-heart, organs,and bones start to form
-develop head and trunk
-arm and trunk
arm and leg limb bands appear
-brain begins development
-eyes and ears begin to form
-heart continues to develop, and beats a regular rhythm
-baby is 1/6 inch long -
Period: to
Weeks 7-8
-brain and face shape begin growing
-four- chamber heart
-lungs begin to form
-fingers and toes start to form
-ears begin to develop internally
-lips and nose have formed
-trunk and neck begin to straighten
-baby is about 1/2 inches long
-all major organs re foremed -
Period: to
Week 10
-head is half the size of the baby
-all body parts are present
-eyes, ears,arms,and legs are identifiable
-baby is 1 1/4 inches long -
Period: to
Week 11
-genitals develop
-head is about half of the length of baby
-teeth buds form
-baby is about 2 inches in length and weight about 1/3 ounces -
Period: to
Week 12
-finger nails grow
-face has more defined profile
-intestines are in the abdomen
-about 2 1/2 inches in length and weighs about 1/2 ounces -
Week 14
-babys 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 -
Period: to
week 16
-baby is moving but mom can not feel it
-baby is about 4 1/2 inches in length and weighs about 4 ounces -
Weeks 18-19
-baby begins to hear
-digestive system works
-vernix caseosa covers the baby -
Period: to
weeks 20-21
-regular sleep and wake patterns
-all organs and structures formed
-breathing movements occur but are underdeveloped
-covered in lanugo
-may begin to suck thumb
-baby is about 6 1/3 inches in length and weighs about 11 inches -
Period: to
Week 22
-has nails, fingerprints, eyebrows, lashes, and possibly some hair
-more active
heartbeat heard with a stethoscope
-lowest limit of viability (survival outside the mother)
-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
-regular sleep and wake patterns
-baby is about 8 inches in length and weight about 1 1/3 pounds -
Week 28-29
-eyes begin to partially open and close
-central nervous system directs breathing and baby temp control
-lungs are capable of breathing air
-baby begins to kick and stretch
-baby is about 10 inches in length and weighs about 2 1/4 pounds -
Week 31-32
-finished most major development
-rapid weight gain begins
-baby is about 11 inches in length and weighs about 3 5/4 pounds
-lanugo starts to fall off -
Week 34
-continues to grow finger nails and toe nails
-develop breathing motion
-responds to light
-skin is pink and smooth
-baby is about 12 inches in length and weighs about 4 1/2 pounds -
Weeks 36-37
-takes up most of the amiable
-starts to turn head down to prepare for labor
-baby is about 13 1/2 inches in length and weighs about 6 pounds
-will continue to gain about 1/2 pound a week until delivery -
Week 38-40
-brain lungs and liver still developing
-brain will double in size between weeks 35 and 39
lung development during the last few weeks helps with fewer complications after birth
-at week 39, baby is considered full term
-weight gain helps with temperature control once born