The Baby

Week 13

Your baby looks like an actual baby now. Its sex organ is beginning to look more formed, so it might be possible to tell if you’ll be having a boy or a girl. Of course, the baby needs to be in the right position to be able to tell from the ultrasound. Your baby’s fingerprints are also forming at this time, which we all know represents identity. A  one-of-a-kind, unique, tiny being continues to develop inside of you. It’s about 6.8-7.5 centimeters in size at the moment, which is about the size of a peach. It can kick, suck its thumb, move around and even its vocal cords are being formed this week.

Week 14

Your baby’s reproductive system is rapidly developing. Its prostate gland is formed if it’s a boy and if it’s a girl, millions of eggs are produced in its ovaries. Its thy-roid glands begin to work as well, so hormone production is also underway. The baby’s soft and hard palates are also forming now.

Week 15

Your baby’s sense of hearing is rapidly developing. If both you and your partner speak nicely to your belly, which holds your baby, your baby will begin to rec-ognize your voices. This week, the size of your baby reaches 9.3-10.3 cm, similar to an orange. Don’t be surprised if you begin to feel a few little kicks this week, but it’s still too early for the bigger kicks.

Week 16

Your baby has eyelashes now. Its circulatory and urinary systems are func-tional. It is 10-13 cm tall and weighs about 80-150 grams. Fine body hair called lanugo covers its head.

Week 17

Your baby’s about 11-13 cm tall and even though it gained a lot of weight in two weeks, it still weighs only 100-150 grams. The umbilical cord that connects the ba-by to the placenta is getting thicker and stronger. Your baby can now move its joints and skeleton. This skeleton, which has been soft cartilage until now, is hardening and turning into bone.

Week 18

Your baby is busy bending its arms and legs and you’ll probably start to feel these movements much more. The kicks are becoming stronger. Blood vessels can be seen throughout its thin skin and it also learned how to hiccup!


Week 19

I know you’re wondering what the current size and weight of your baby are. It’s 13-15 cm tall and weighs around 200-225 grams. If you’re having a girl, surprisingly enough, there are 6 million eggs in its ovaries right now. This is an important period for sensory development: Your baby’s brain is dedicating areas responsible for smelling, tasting, hearing, seeing, and touching. You might think that it’s quiet inside your belly, but that’s not true because there is a lot of noise inside of you. You produce lots of sounds like a factory as your internal organs work and your blood flows, and your baby can hear all of that. Babies who get used to sleeping surrounded by such sounds crave that same soundscape after birth as well. As a result of that need, there are even toys that produce what is called “white noise.” You can use white noise machines or toys for babies who don’t like to sleep in silent environments.

Your baby can even hear whatever is going on outside your body now. Some women like to talk directly to their babies, but even if you don’t, they can hear your voice as you talk to other people. I did talk to my baby out loud from time to time and transferred lots of thoughts and feelings to her on the inside. I think that babies can feel their mothers in that way too. After all, you still share one body.

You are now nearly halfway through, congratulatIons!

Week 20

Your baby weighs around 205 grams and 14-6 cm tall from its butt to its head. For the first 20 weeks, the baby’s height is measured from the top of its head to the bot-tom of its butt, and from this point on the measurements are taken from the head to the feet. This is because during the first trimester, the baby’s legs are crossed in front of its body and that makes it hard to measure them.

A waxy, white substance called vernix caseosa coats the baby’s skin to protect it as the baby is submerged in amniotic fluid for a long time. This slick coating will make the journey through the birth canal easier when it’s time to come out.

Week 21

Your baby is really active in your belly now. Research shows that babies move about 50 times even as they sleep. All these movements help with the baby’s mental and physical development. You might not feel 50 kicks, punches, or turns throughout the day, but don’t be surprised if your tiny little ninja baby starts dancing as you get ready to go to bed at night. If you’re wondering why the baby waits until the middle of the night when you try to get some rest to start moving around, it doesn’t move more than it does during the day. It’s just easier for you to notice the movements in a calmer and more quiet environment.

Week 22

Your baby continues to grow safely in your belly. The baby’s skin will keep looking wrinkled until it gets heavy enough to fill its skin out. Its pancreas, which is es-sential for the production of hormones, is also gradually developing. The baby’s lips appear more formed and the initial signs of its first few teeth look like little buds under the gumline. Unless your baby’s one of those rare babies born with teeth, you won’t see the first tooth until it’s about 4-7 months old. 

In short, your baby’s growing at full speed to be united with you.

Week 23

Your baby is 20 cm tall and weighs a little more than 450 grams. It can feel your movements now, so you could try listening to some uplifting tunes and lightly dancing, I’m sure the baby will appreciate that. At this stage, your baby’s face is red and wrinkled. It will also probably look pink or reddish at birth. This color is due to the blood vessels that can be seen through its translucent skin. The baby’s real skin color will become apparent in the first year after it is born.

The blood vessels in its lungs are developing in a way that will prepare the baby to breathe. The lungs are the last organs to become fully functional in babies.


Week 24

Your baby keeps growing. It has gained about 110 grams since last week when it weighed just over 450 grams. It still looks quite tiny, but its little body is propor-tionally gaining weight. The baby’s skin is thin, translucent, and wrinkled, its brain is rapidly developing and its sense of taste might be functional. Its lungs are developing the “branches of the respiratory tree” and the cells that produce a substance to facili-tate the inflation of air sacs.

Week 25

Your baby’s size, from head to heel, is about 22 cm. It weighs 700-750 grams, which doesn’t sound like much, but its long and thin appearance is gradually becoming rounder. The baby’s skin will begin to straighten out as it gains more weight and the baby will begin to look much more like a newborn. Its nostrils, which had been closed until now, will begin to open up this week, and so it can practice breathing. Its vocal cords are also becoming functional which causes the occasional hiccups.


Burcu Kutluk


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