Unborn baby's feet at 10 weeks
Unborn baby at 8 weeks
- Day 1 - conception takes place.
- 7 days - tiny human implants in mother’s uterus.
- 10 days - mother’s menses stop.
- 18 days - heart begins to beat.
- 21 days - pumps own blood through separate closed circulatory system with own blood type.
- 28 days - eye, ear and respiratory system begin to form.
- 42 days - brain waves recorded, skeleton complete, reflexes present.
- 7 weeks - photo of thumbsucking.
- 8 weeks - all body systems present.
- 9 weeks - squints, swallows, moves tongue, makes fist.
- 11 weeks - spontaneous breathing movements, has fingernails, all body systems working.
- 12 weeks - weighs one ounce.
- 16 weeks - genital organs clearly differentiated, grasps with hands, swims, kicks, turns, somersaults, (still not felt by the mother.)
- 18 weeks - vocal cords work – can cry.
- 20 weeks - has hair on head, weighs one pound, 12 inches long.
- 21 weeks - youngest child to survive outside womb after premature birth
- 23 weeks - 15% chance of viability outside of womb if birth premature.*
- 24 weeks - 56% of babies survive premature birth.*
- 25 weeks - 79% of babies survive premature birth.*
(*Source: M. Allen et. al., "The Limits of Viability." New England Journal
of Medicine. 11/25/93: Vol. 329, No. 22, p. 1597.)
Priests for Life: Facts of Fetal Development
Pictures of developing babies at different stages of gestation.
Just the Facts
Provides the "facts of life" before birth
Gravity Teen Fetal Development Page
Photos and commentary on growth and fetal development from conception through birth.