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SSW 1 to SSW 40: All weeks of pregnancy at a glance
With each week of pregnancy, the baby inside your womb continues to develop. This article gives you an overview:
- How does the embryo develop in the 1st to 12th week of pregnancy (first trimester)?
- How is the baby developing at 13 weeks to 28 weeks (second trimester)?
- How developed the baby in the 29th to 40th week of pregnancy (third trimester)?
Please note that every pregnancy is different and your child will move at their own pace. So don't worry if, for example, it is a little lighter or smaller than the average fetus at one point in time and stay in close contact with your gynecologist.
The first trimester of pregnancy (week 1 to week 12 )
In the first few weeks of pregnancy, your child may be just a bunch of cells from a medical point of view, but a lot is going on. In the 12th week of pregnancy, the fetus already looks like a small person.
You can find out what you should consider in the first trimester of pregnancy here.
SW 1. up to week 4
During the first four weeks of pregnancy, a sperm fertilizes the egg cell.The egg cell divides several times. In a short time, a so-called cluster of cells develops, which migrates through the fallopian tube over the next few days and settles in the uterus.
In the 5th week of pregnancy, the heart of the embryo begins to beat. However, this is not yet visible on the ultrasound.
We are already in the 6th week of pregnancy created the cardiovascular system. The arms and legs can also be seen as small protuberances.
An irregular heartbeat can already be seen on an ultrasound from the seventh week.
In the 8th week of pregnancy one can partially detect spontaneous movements of the embryo.
In the 9th week, the face continues to develop: ears, nose and eye sockets are formed and are now clearly recognizable.
In the 10th week of pregnancy, the embryo is 1.5 to 2 cm in size. At this point, nerve cells and muscles are already sufficiently developed that the child can move freely in the amniotic sac.
The fetal period begins in the 11th week of pregnancy: the little one is no longer called an embryo, but a fetus, since all its organs are now formed.
During this week of pregnancy, the baby will start swallowing amniotic fluid and may have the occasional hiccup.
The second trimester of pregnancy (13th week to 28th week of pregnancy)
In the following weeks of pregnancy, the bond becomes stronger even more powerful for your unborn child: it will now hear your voice and you can play your favorite music to the baby. In addition, your gynecologist can determine in the second trimester whether you are expecting a boy or a girl.
You can find out what you should consider in the second trimester of pregnancy here.
SW 13< /h3>
The fetus slowly develops taste buds at 13 weeks and detects when the taste of the amniotic fluid changes because you have eaten something.
The formation of urine has already started at this point. The ultrasound shows how the bladder is filling in week 14.
In week 15 During the week of pregnancy, the baby's bones will strengthen. The body needs sufficient calcium for this.
In the 16th week of pregnancy, the baby wears the so-called lanugo hair on its head. Each hair has a sebaceous gland that produces the so-called cheese grease. The greasy substance is used as a lubricant during birth.
GW 17: The baby is now particularly active: it uses the space in the stomach to coordinate his movements better and better.
An ultrasound can be used in the 18th week of pregnancy to tell with a high degree of probability whether your baby will be a girl or a boy.
In the 19th week of pregnancy, the inner genitals of the fetus continue to develop.
In the 20th week of pregnancy, your baby weighs around 300g and is about the size of a pepper.
In the 21st week of pregnancy, the baby puts on the so-called brown fat. It serves as a source of energy in the first few days after birth.
There are already small ones on the face of the fetus recognizable eyebrows. You can find more information about the 22nd week of pregnancy here.
Your baby has put on a lot in SSW 23 and weighs around 500g.
The child is now developing the subcutaneous fatty tissue, which means that the skin no longer looks as wrinkled. Here is more information about the 24th week of pregnancy.
Once the 25th week of pregnancy is reached, the child is officially considered viable. Nevertheless, it is still a good idea to continue developing in the womb so that you do not have to rely on medical measures in the event of a premature birth.
The external genitals have now fully developed by the 26th week of pregnancy.
In the 27th week of pregnancy, the baby opens its eyes for the first time. Before the eyelids were glued together, now there is a clear view.
The lanugo hairs are expelled and the baby now grows real hair. Detailed information on SSW 28 can be found here.
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The third trimester of pregnancy (week 29 to week 40)
In the last few weeks of pregnancy, the baby turns into the birth position and prepares for the final birth. At the same time, it has another growth spurt, and the stomach is slowly getting tight!
You can find out here what you should consider in the last trimester of pregnancy.
The abdominal wall and the uterus are translucent from the 29th week of pregnancy. The baby's pupils now react to the different light conditions.
Brain development is now complete. After that, only further connections between the individual nerve cells are formed. You can read here what else happens in SSW 30.
From around the 31st week of pregnancy, the baby turns into the birth position and slides a little deeper into the pelvis.
From the 32nd week of pregnancy, the womb becomes increasingly tighter. Depending on the lying position of the child, you may now discover individual bumps on your stomach. Then it pushes itself against the wall of the uterus, for example with its foot. Don't worry, that's normal too.
The belly and ribs of the unborn child now rise and fall with every breath, so that this can also be clearly seen on the ultrasound image in the 33rd week of pregnancy.
In SSW 34, the baby's sense of balance can be trained by dancing to your favorite music or simply rocking your tummy back and forth.
The functions of the lungs are fully developed from the 35th week of pregnancy.
By now your baby has real fingernails that reach to the fingertips. You can read here what else exciting happens in the 36th week of pregnancy.
If your child stayed in the womb up to the 37th week of pregnancy, it is officially no longer a premature birth.
From SSW 38 the toenails are also fully developed and reach to the tips of the toes.
A birth ten days before or ten days after the due date is considered due. So it can start at any moment. You can find more about SSW 39 here.
It's that time! After almost 40 weeks, your baby is ready for birth: on average, it is now 48 to 54 centimeters long and weighs between 2.8 and 4.2 kg.