Prenatal Development Timeline By: Lizzy

By Liz_Dog135

  • Month 1

    Brain and Spinal Cord Develope

  • Conception

    Egg & Sperm Unite

  • 7 Weeks

    Can't tell if the embryo is a boy or girl

  • End of 6th Week

    SRY chromosome released

  • 5 Months

    Baby begins to hear sounds

  • Week 3

    Blastocyst attaches to the lining of the uterus

  • Week 6

    Heart is beating; organs are developing

  • Week 9

    Baby is 1" long: arms, hands, feet, legs, and eyes are developed; baby starts moving

  • Week 10

    Vital organs are formed; birth defects are unlikely to develop after this week

  • Week 12

    Finger and toe nails develop; end of first trimester

  • week 14

    Can tell if the fetus is a boy or a girl

  • Week 18

    Can begin to feel baby's movements

  • Week 21

    Fetus can hear sounds

  • Week 26

    Last trimester; fetus develops "baby fat"

  • Week 28

    Baby's eyes are beginning to open; can see

  • Week 32

    Baby is 4 pounds 11 inches; lanugo is falling off

  • Week 36

    Baby is in position for delivery