Life in the Womb. PED 392 Child Growth and Development. Timeline. Usually a 40 week system Can also be a 38 week system with week 1 being the 3 rd week of the 40 week system Broken into 3 trimesters Week 15 Week 28-29 Week 40. Week 1. Mothers last menstruation - PowerPoint PPT Presentation
Life in the Womb
Life in the WombPED 392Child Growth and
DevelopmentTimelineUsually a 40 week systemCan also be a 38 week
system with week 1 being the 3rd week of the 40 week system
Broken into 3 trimestersWeek 15 Week 28-29Week 40Week 1Mothers
last menstruation
In a 38 week system, this is week -2.Week 3The baby is
created!!!
Fertilization of the egg
Implantation
In a 38 week system, this is week 1.Week 4Mothers missed
period
Cell differentiation beginsWeek 5Length = 0.1 in
Brain, spinal cord, heart begin to develop
Gastrointestinal tract begins to developWeek 6Length = 0.2-0.3
in
Tissue for vertebrae forms
Heart beat is regular and blood flows
Brain develops into 5 areas
Arms and legs begin to develop
Week 8Length = 0.5 in
Lungs begin to develop
Arms and legs continue to developWeek 9Length = 0.7 in
All essential organs are formed or have begun to formWeek
10Length = 1.2 in
Pregnancy detectable by exam
Head looks human
Eyelids are developed
Ear begins to form externallyWeek 11Length = 2.0 inWeight = 0.3
oz
Eyelids closed (wont open again until week 30)
Week 12Length = 2.4 inWeight = 0.5 oz
Form recognizable as human
Responds to stimulation
Fingernails begin to developWeek 14Length = 3.4 inWeight = 1.6
oz
Essential organs formed
Circulatory system works
Sex is distinguishable
Fist can be madeWeek 16CONGRATULATIONS - its your 2nd
trimester
Length = 4.7 inWeight = 3.9 oz
Mother shows
Skeleton can be seen in x-ray
Toe-nails developWeek 18Length = 5.5 inWeight = 7.1 oz
Baby can suck
Sex organs distinct
Meconium is madeWeek 20HALF WAY DONE!!!
Length = 6.3 inWeight = 11.3 oz
Vernix caseosa covers skin (white sticky substance)
Quickening can be felt by mother
Week 22Length = 7.5 inWeight = 1 lb
Head and body has hair
Babies movement increases
Week 24HUGE WEEK!!!!
Length = 8.3 inWeight = 1.4 lbs
survive outside womb POSSIBLE with helpWould need medical help
for extended periodWeek 26Length = 9.1 inWeight = 1.8 lbs
Eyes developed
Startle reflex
Foot and finger prints develop
Air sacs form in lungsWeek 28ENORMOUS WEEK!!!!
Length = 9.8 inWeight = 2.2 lbs
Survival outside womb PROBABLE with medical help
Week 30BEGIN 3rd TRIMESTER
Length = 10.6 inWeight = 2.9 lbs
Eyes open again
Storage of minerals beginsIron, Calcium, Phosphorous
Week 32Length = 11.0 inWeight = 3.7 lbs
Fat forming on baby (until birth)Week 34Length = 11.8 inWeight =
4.6 lbs
Fingernails grow to end of finger
Skin smoothWeek 35MONSTEROUS WEEK!!!!!
SURVIVAL OUTSIDE WOMB EXPECTEDWithout medical helpWeek 38Length
= 13.4 inWeight = 6.4 lbs
Body plump
Body hair gone
Firm graspWeek 40Length = 14.2 inches crown to rump 20 inches
head to toeWeight = 7.5 lbs
BABY IS DUE!!!!
Baby can come up to 2 weeks lateUsually a c-section is scheduled
after 2 weeksReferenceTallack, P. (2006). In The Womb. National
Geographic Society. Washington D.C.
