Pre-Natal Timeline

• Day 1: conception day
• day 7: embryo implants in mothers uterus
• 10 days: mothers' menstruation stops
• 18 days: heart begins to beat
• 21 days: blood starts to pump through own closed circulatory system, and with its' own blood type
• 28 days: eyes, ears and respiratory system start to develop
• 42 days: brain waves recorded, skeleton formed, reflexives present
• 7 weeks: thumb sucking
• 8 weeks: all body systems present
• 9 weeks: squints, swallows, moves tongue, and makes fist
• 11 weeks: spontaneous breathing movement, have fingernails, all body systems functioning
• 12 weeks: weight 1 ounce
• 16 weeks: genital organs clearly differentiated, hands grasp, swimming, kicking, and movement, but not detected by the mother
• 18 weeks: vocal cords are functional
• 20 weeks: has hair on head, weighs 1 pound and is 12 inches long
• 23 weeks: 15% viability if birth premature
• 24 weeks: 56% premature birth survival rate
• 25 weeks: 79% premature birth survival rate