Fetal Development Timeline

Timeline created by Bre & Ry
  • Six Weeks Pregnant

    Six Weeks Pregnant
    Your baby's jaw, cheeks, chin, eyes, ears, and nose are beginning to form what will eventually become one adorable face. In addition, her kidneys, liver, and lungs are developing, and her heart is now beating 80 times a minute (and getting faster every day). All this and she's still no bigger than the length of a nail head (about a quarter of an inch) from crown to rump! http://www.whattoexpect.com/pregnancy/week-by-week/week-6.aspx
  • 9 Weeks Pregnant

    9 Weeks Pregnant
    Your baby, now the size of a green olive, has grown about an inch since last week. Tiny muscles are beginning to form, so while he might not be ready to pump iron, he's gearing up to move his arms and legs. It's still too soon to feel anything in your belly, but you might be able to hear something at your next checkup. Try listening for your baby's heartbeat via a Doppler device. http://www.whattoexpect.com/pregnancy/week-by-week/week-9.aspx#
  • 12 Weeks Pregnant

    12 Weeks Pregnant
    By now, your baby weighs a full half-ounce. Most of his systems are in place, though there's still plenty of maturing to do. For one thing, his fetal digestive system is beginning to practice contraction movements necessary for eating, and his bone marrow is busy making white blood cells.The pituitary gland (at the base of the brain) has started producing the hormones that'll enable him (or her) to make babies of his (or her). http://www.whattoexpect.com/pregnancy/week-by-week/week-12.aspx
  • 15 Weeks Pregnant

    15 Weeks Pregnant
    She's about the size of an orange this week, her ears have migrated to the sides of her head, and her eyes are moving to the front of her face. Plus, your little smarty-pants can now wiggle her fingers and toes and make breathing movements in preparation for life outside the womb. http://www.whattoexpect.com/pregnancy/week-by-week/week-15.aspx
  • 18 Weeks Pregnant

    18 Weeks Pregnant
    At five and a half inches long and five ounces in weight, he now may be large enough for you to feel him twisting, rolling, kicking, and punching his way around the womb. Plus, he's developing yawning and hiccupping skills (you may feel those soon, too!) and his own unique set of toe and fingerprints. http://www.whattoexpect.com/pregnancy/week-by-week/week-18.aspx
  • 21 Weeks Pregnant

    21 Weeks Pregnant
    How big is your baby? About the size of a large banana — and speaking of bananas, if you eat one this week, there's a good chance your baby will get a taste, too. That's because he swallows a bit of amniotic fluid each day (for nutrition, hydration, and to practice digesting), so he eats whatever's on your menu — and gets to put those developing taste buds to good use. http://www.whattoexpect.com/pregnancy/week-by-week/week-21.aspx
  • 24 Weeks Pregnant

    24 Weeks Pregnant
    Your baby is about eight and a half inches long and weighs one and a half pounds, gaining steadily at a rate of six ounces per week. Much of that weight comes from accumulating baby fat, as well as from growing organs, bones, and muscle. Those little ears of hers are getting sharper. Also by now, that fabulous face is almost fully formed, complete with eyelashes, eyebrows, and hair. Her locks are white since there's no pigment yet. http://www.whattoexpect.com/pregnancy/week-by-week/week-24.aspx
  • 26 Weeks Pregnant

    26 Weeks Pregnant
    She now weighs a full two pounds and measures nine-plus inches. And this week, her eyes, which until now were developing under fused eyelids, start to open. Of course, there's not much to see in there, but if your baby spots a bright light (or hears a loud noise) near your belly, you may notice an increase in fetal activity. http://www.whattoexpect.com/pregnancy/week-by-week/week-26.aspx
  • 30 Weeks Pregent

    30 Weeks Pregent
    Also growing daily is his brain, which is actually starting to look like the real thing with those characteristic grooves and wrinkles. And now that your little genius can regulate his own body temperature and turn up the heat, he'll start shedding lanugo, the downy body hair that's been keeping him warm up until now. http://www.whattoexpect.com/pregnancy/week-by-week/week-30.aspx
  • 33 Week Pregnant

    33 Week Pregnant
    Your baby is still gaining weight (about half a pound a week), and she could grow up to another full inch this week. With that much baby inside your uterus, your amniotic-fluid level has maxed out, which explains why some of her pokes and kicks feel pretty sharp these days. http://www.whattoexpect.com/pregnancy/week-by-week/week-33.aspx
  • 40 Weeks Pregnant

    40 Weeks Pregnant
    Your baby probably weighs anywhere from six to nine pounds and measures between 19 and 22 inches (though tons of perfectly healthy babies are smaller or bigger). The bones in his skull haven’t fused yet — Mother Nature’s way of making it easier to get through the birth canal during labor and delivery. He now has enough fat under the skin to maintain his body temperature outside the womb. http://www.whattoexpect.com/pregnancy/40-weeks-pregnant.aspx