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Ovulation
When a mature egg is release from the ovary -
Conception
The joining of a male cell(sperm) and a female cell(egg) -
The Germinal Stage
1)Cell divisions are occurring
2.)Fertilized egg embedding in the wall of the uterus
3.)Amnion, placenta, and umbilical cord beginning to form
4.)Conception through 2 weeks -
The Embryonic Stage
1.)Internal organs(heart, liver, digestive system, brain, and lungs) start developing
2.)Tissue segments(future vertebrae) in a spinal column forming
3.)Limb buds(future arms and legs) appearing
4.)Ears and eyes beginning to form
5.)4 1/2 week old embryo
6.)2 weeks through 8 weeks -
Fetal stage week 9-12
1.)facial features forming
2.)limbs,hands,feet,fingers,and toes developing -
Fetal stage week 12-16
1.)3 in long; weight 1 oz
2.)muscles forming
3.)teeth and vocal cords developing
4.)eyelids and nails appearing -
Fetal stage week 20-24
1.)10-12 in. long; weight 1lb.
2.)Sweat glands forming
3.)Head hair appearing
4.)Vernix caseosa (cheesy material) covering body
5.)Skin developing -
Fetal stage week 24-28
1.)14 in. long;weight 2 lbs
2.)Eyes maturing
3.)Taste buds developing -
fetal stage week 16-20
1.)6-8 in. long; weight 5-6 oz
2.)lanugo(cottony growth) appearing
3.)Heartbeat audible by stethoscope
4.)Eyebrows and eyelashes growing -
Fetal stage 28-40
1.)Growing rapidly
2.)Languo disappearing
3.)Fatty tissue forming under skin
4.)Body organs maturing
