Antione Jackson(4); Fetal Development Timeline ✅ DONE

Timeline created by
  • First day of my last period

    First day of my last period
  • Week 1

    Week 1
    Week 1 is actually the mensural period, but because the due date is calculated from the first day of your last period, it counts as part of your 40-week pregnancy. After the period, your body begins to prepare the uterus for pregnancy.
  • Week 2

    Week 2
    If you could see inside your 2 weeks pregnant belly at the time of ovulation, it’d go a little something like this: First your ovary releases an egg into your fallopian tube, where it must be fertilized within 12 to 24 hours.
  • Week 3

    Week 3
    A 3 weeks pregnant ultrasound may not detect your soon-to-be-baby. That super teeny fertilized egg (called a marula) is smaller than a grain of salt and is on the move—but as early as week 4 your doctor may be able to see your uterine lining get thicker, a sign that the little marula has reached his or her destination for the next nine months. You guessed it: Your uterus.
  • Week 4

    Week 4
    During week 4 of pregnancy, the ball of cells is splitting into the embryo (your future child) and placenta. Baby's neural tube, the building block of the spine, brain, and backbone, is already formed. The amniotic sac and fluid are forming into protective cushioning for your baby. And on a 4 weeks pregnant ultrasound, all of that just looks like a tiny dot, called the gestational sac.
  • Week 5

    Week 5
    Embryo doesn't look like much more than a tadpole right now, but he or she's already starting to form major organs—heart, stomach, liver, and kidneys—and systems—digestive, circulatory, and nervous).
  • Week 6

    Week 6
    If you did have a 6-week ultrasound, the doctor might be able to see a fetal pole or fetal heartbeat—a clear sign that you’ve got an embryo developing in there. However, if the doctor doesn’t see a fetal pole or heartbeat, don’t panic—you might not be as far along as you thought. The doctor will probably ask you to come back in a few days or a week for another ultrasound.
  • Week 7

    Week 7
    7-week embryo is generating about one hundred new brain cells each minute! And not only is baby's brain becoming more complex, but the heart is too. Also important: Baby's developing a permanent set of kidneys, and arm and leg joints are now forming as well.
  • Week 8

    Week 8
    You might have your first prenatal checkup around this time ,and if you do, you may get to catch a glimpse of your 8-week fetus on the ultrasound. You might be surprised to see baby’s arms and legs moving around like crazy in there.You can’t feel it yet, but it’s really happening.At week 8 of pregnancy, baby's fingers and toes are now only slightly webbed, and his or her tail is gone. Fun fact: baby's taste buds are now forming, gearing up for his or her first meals.
  • Week 9

    Week 9
    Week 9 of pregnancy is a milestone: Baby's no longer an embryo—now he or she is a fetus! These two terms simply define different phases of development. The embryonic phase is about forming major organs, including the brain, heart, and lungs, plus the arms and legs. Once you’ve got a fetus, those organs and parts are formed and are now growing and developing.
  • Week 10

    Week 10
    At ten weeks pregnant, baby has working arm joints, and cartilage and bones are forming. Your 10-week fetus’ vital organs are fully developed and they're starting to function. Fingernails and hair are starting to appear too!
  • Week 11

    Week 11
    You can't see it, but baby's moving fluidly and gracefully inside your 11 weeks pregnant belly. Your 11-week fetus has skin that’s see-through, but is on its way to becoming more opaque. At 11 weeks, baby's fingers and toes aren't webbed anymore. Tooth buds, hair follicles, and nail beds are forming too.
  • Week 12/ End of first Trimester

    Week 12/ End of first Trimester
    Your fetus at 12 weeks is almost done developing his or her body’s important systems and parts, which means it’s all about getting bigger and more mature from here on out. Yep, baby's about to enter the growth and maturation stage, in which organs and tissues will grow and develop rapidly.Baby at 12 weeks is opening and closing his or her fingers and curling toes. And baby’s brain is developing fast!
  • Week 13/ Start of 2nd Trimester

    Week 13/ Start of 2nd Trimester
    A 13-week ultrasound could detect baby’s gender, but since it can be pretty tough to make out little boy or girl parts, your doctor will probably wait until the mid-pregnancy ultrasound (around 18 to 22 weeks), when it will be much more obvious, to look and see whether you’re having a girl or a boy.
  • Week 14

    Week 14
    A 14-week fetus’ kidneys are making urine, and the liver and spleen are doing their jobs too. You might be surprised to hear that baby at 14 weeks is growing lanugo, a thin, peach fuzz-like hair, all over—it'll help keep the body warm!
  • Week 15

    Week 15
    15 weeks pregnant ultrasound would reveal that baby's squirming a ton in there, now that he or she is able to move all limbs and joints! Baby might even be hiccupping inside your 15 weeks pregnant belly.
  • Week 16

    Week 16
    Inside your 16 weeks pregnant belly, baby’s listening to your voice, thanks to tiny bones forming in his or her ears. Your 16-week fetus is growing hair, lashes, and eyebrows. And his or her taste buds are forming.
  • Week 17

    Week 17
    Baby's rubbery cartilage is now turning to bone. And baby's growing some meat on those bones, putting on some fat. Your 17-week fetus is growing a stronger, thicker umbilical cord too.
  • Week 18

    Week 18
    Your 18- week fetus is working his or her muscles and practicing all kinds of moves. Can you believe baby's yawning, hiccupping, sucking, and swallowing? He or she is twisting, rolling, punching, and kicking too—and is big enough that you might be able to feel him or her doing it!
  • Week 19

    Week 19
    Your 19-week fetus is developing a protective coating over his or her skin called vernix caseosa. It's greasy and white and you may see some of it at birth. Baby at 19 weeks is also working on his or her on five senses. Yep, nerve cells for sense of taste, hearing, sight, and smell are all developing in baby's brain.
  • Week 20

    Week 20
    Your 20-week fetus now has working taste buds. He or she is gulping down several ounces of amniotic fluid each day—that's significantly more than before.
  • Week 21

    Week 21
    As baby's digestive system preps for the outside world, he or she's manufacturing meconium—the tarry black substance you'll find in the first dirty diaper.
  • Week 22

    Week 22
    Now that baby's eyes and lips are more developed, he or she's looking even more like a newborn. Baby's sleeping in cycles—about 12 to 14 hours per day
  • Week 23

    Week 23
    Wondering what you’d see if you had a 23 weeks pregnant ultrasound? Well, baby's forming little nipples at this stage. And your cute little 23-week fetus’s face is fully formed—he or she just needs a little extra fat to fill it out. Baby's entertaining him- or herself by listening to your voice and your heartbeat, and can even hear some loud sounds like cars honking and dogs barking.
  • Week 24

    Week 24
    Your 24-week fetus’ see-through skin is gradually becoming more opaque, and it’s taking on a fresh, pink glow, thanks to the small capillaries that have recently formed.
  • Week 25

    Week 25
    Your 25-week fetus is now learning which way is up and which is down. In the arena of 25 weeks fetal development, baby’s growing more fat and more hair too!
  • Week 26

    Week 26
    Baby's getting his or her immune system ready for life on the outside by soaking up your antibodies. And baby's eyes are forming, and his or her eyes will soon start to open. Can you believe your 26-week fetus has already grown eyelashes? Soon, he or she will start batting them.
  • Week 27/ End of 2nd Trimester

    Week 27/ End of 2nd Trimester
    Inside your 27 weeks belly, baby’s practicing inhaling and exhaling with his or her rapidly developing lungs. And it's official: Baby's showing brain activity! From here on out, baby’s brain will keep getting more complex
  • Week 28/ Start of 3rd Trimester

    Week 28/ Start of 3rd Trimester
    Baby's starting to develop more fat, so his or her once-wrinkly skin is starting to get smoother. In pretty amazing news, baby's practicing breathing. Your 28-week fetus’ lungs are mature enough that if he or she were to be born now, he or she would probably survive.
  • Week 29

    Week 29
    Baby's getting a little cramped in there—that’s a given, seeing how fast he or she's growing. That means all those kicks and jabs are getting stronger. You might even feel a subtle, repetitive twitch. That’s your week 29 fetus hiccupping.
  • Week 30

    Week 30
    Your 30-week fetus’ skin is now getting smoother, but his or her brain is getting wrinklier—that’s to make way for all that essential brain tissue. Your baby at 30 weeks is now strong enough to grasp a finger! That’s a skill he or she will certainly use post-birth.
  • Week 31

    Week 31
    Your week 31 fetus is going through major brain and nerve development. His or her eyes are developing too—the irises can now react to light! (A little light does shine into your 31 weeks pregnant belly at times!) In fact, all five of baby’s senses are in working order.
  • Week 32

    Week 32
    Baby's getting ready for his or her descent—and, as we mentioned—is likely in the head-down position now. He or she is probably feeling even more cramped.
  • Week 33

    Week 33
    If you were to have a 33 weeks pregnant ultrasound, you’d see that baby's keeping his or her eyes open while awake. Baby's also starting to coordinate breathing with sucking and swallowing—an important skill for life “on the outside.” Your 33-week fetus’ bones are hardening.
  • Week 34

    Week 34
    You’ll likely take a trip to the OB this week, since you’re probably seeing her every other week. If your doctor orders it, you could have a biophysical profile (BPP), which is a combination of a 34 weeks pregnant ultrasound and a special non-stress test, which measures baby’s heart rate over a period of time. Together, these two tests help the doctor confirm that baby’s reacting well to stress and thriving.
  • Week 35

    Week 35
    Baby’s hearing is now fully developed, and your 35-week fetus responds best to high-pitched noises. If you are pregnant with a boy, you would see on a 35 weeks pregnant ultrasound that his testes have probably fully descended
  • Week 36

    Week 36
    At 36 weeks pregnant, baby's liver and kidneys are in working order. Circulation and immune systems are basically good to go. Now, baby is getting closer and closer to being able to breathe on his or her own. Plus, your 36-week fetus’s skin is getting smooth and soft, and his or her gums are rigid.
  • Week 41

    Week 41
    As you await baby's arrival, he or she's plumping up a bit more. Your 41-week fetus is growing even longer hair and nails. No wonder some newborns come out with a full head of hair and ready for a mani-pedi!
  • Week 37

    Week 37
    Baby's practicing some cool new skills: inhaling, exhaling, sucking, gripping, and blinking. In less cute news, baby's getting the first sticky poop (called meconium) ready for his or her first diaper.
  • Week 38

    Week 38
    Baby may have about an inch or so of hair already. Baby's slowly shedding that white goo on the skin (remember, that stuff called vernix caseosa?) but you might see some of it at birth.
  • Week 39

    Week 39
    Inside your 39 weeks pregnant belly, baby's probably able to flex his or her limbs now. Baby's brain is still rapidly developing—he or she’s getting smarter by the week! Baby's nails may extend past the fingertips now.
  • Due date

  • Week 40

    Week 40
    Your 40-week fetus is continuing to grow hair and nails. And baby at 40 weeks is keeping up that lung development too.
  • Week 42

    Week 42
    Because your 42-week baby has probably shed the vernix caseosa (that filmy stuff that covered his or her skin), the skin is probably getting a little dry at this point.
  • Baby is Born

    Baby is Born
    A beautiful baby boy/girl is born 6Lb 16oz