-
Period: to
week 1-2
none -
Period: to
week 3-4
-conception
-zygote turns into blastocyst and travels down the Fallopian tubes
-rapid cell division begins
-blastocyst implants in uterus lining during week 4 and becomes embryo -
Period: to
weeks 5-6
-Neutral tube closes; brain and special cord will form
-heart,organs,and bones start to form
-develop head and trunk
-arms and leg limb buds appear
-brain begins development
-eye and ears begin to form
-heart continues to develop and beats a regular rhythm
-baby 1/6 inch long -
Period: to
weeks 7-8
-brain and face begin growing
-four chamber heart
-lungs begin to form
-fingers and toes start to form
-ear begins to develop internally
-nose has formed
-trunk and neck begin to straighten
-baby is about 1/2 inch long
-all major organs are formed -
week 10
-head is half size of the baby
-all body parts are present
-eyes,ears,arms,legs are identified
-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 weighs about 1/3 ounce -
week 14
-sex becomes more apparent
-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 cannot feel it
-Baby is 4 1/2 inches in length and weighs about 4 ounces -
Period: to
week 12
-Fingernails grow
-Face has a more defined profile
-Intestines are in the abdomen
-About 2 1/2 inches in length and weighs about 1/2 ounces -
Period: to
week 18-19
-Baby begins to hear
-Digestive system works
-Vernix caseosa covers the baby -
week 20-21
-regular sleep and wake patterns
-all organs are formed
-breathing movements occur but are under developed
-covered in lanugo
may begin to suck thumb
-baby is about 6 1/3 inches in length and weighs about 11 ounces -
Period: to
week 22-23
-Has nails,fingerprints,eyebrows,lashes, and possibly some hair
-More active
-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 24-25
-Wrinkly skin,translucent and pinkish red
-Being development
-Regular sleep and wake patters
-Baby is about 8 inches' in length and weighs about 1 1/3 pounds -
Period: to
week 28-29
-eyes begin to partially open and close
-central nervous system directs breathing and body temp control.
-lungs are capable of breathing air
-baby begins to kick and strech
-baby is about 10 inches in length and weighs about 2 1/2 pounds -
Period: to
week 31-32
-finished most major development
-rapid weight gain begins
-lanugo starts to fall off
-baby is about 11 inches in length and weighs about 3 1/2 pounds -
Period: to
week 34-35
-continues to grow fingernails and toe nail
-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 -
Period: to
week 36-37
-takes up most of the amniotis
-sarts to turn head down to prepare for labor
-baby is 12 1/2 inches in length and weighs about 6 pounds
-will continue to gain abut 1/2 pound a week until delivery -
Period: to
week 38-40
-brain,lungs, and liver still developing
-brain will double in size between week 35 and 39
-lung development during last few weeks helps with fewer complications after
-at week 39,baby is considered full term
-weight gain helps with temperature control once born