1.TRIMESTER (First 3 months) 1-14 WEEKS

Week 1 – 4
– Ovulation happens.
The timing is right. Now all it takes is for this egg to be fertilized.
– Fertilization takes place
The resulting structure is called the ’embryo’ until the first 8 weeks.
Did you know that the uterine capacity increases 1000 times during pregnancy?
– Gender is determined
Immediately after fertilization, it is clear whether your baby will be a boy or a girl. Gender is determined according to whether the sperm chromosome is “X” (female) or “Y” (male). There is nothing the mother can do at this stage because the egg contains only the X chromosome. You have to wait for the 2nd trimester (three months) before the gender can be seen by ultrasound.
– Nesting in the uterus (implantation)
10-14 days after fertilization, sometimes spotting bleeding may occur during the implantation phase of the uterus. This can be confused with menstrual bleeding, but is usually lighter and of shorter duration.

Week 4
– You begin to suspect that you are pregnant.
– The cell cluster that settles in the uterus is divided into two:
1- It will form the half ‘placenta’ (baby’s partner) adjacent to the uterine wall.
2- The other half facing the uterine cavity will form the baby.
– The liquid medium in the uterus, namely ‘amniotic fluid’, begins to form.
– The cerebrospinal canal is formed
From this channel 1-4 of pregnancy. Between weeks and weeks, the brain, spinal cord, hair and skin develop. The expansion at one end of the tube will form the brain. Already the foundations for your baby’s thoughts, feelings and much more are ready!
– Heart and primitive circulatory system are formed rapidly
The development of this system, which will ensure the continuity of life, is undoubtedly very important, even if it is still in its infancy.
– Lungs, stomach, liver also begin to develop.

Week 5
– The first heartbeats begin in the 5th week
The 26th day after fertilization is when the first heartbeat begins. Although you may not recognize this week’s image as ‘baby’, there must not be such an exciting feeling as seeing the heartbeat on the screen.
The placenta begins to function:
The umbilical cord and ‘chorionic villi’, which hold the embryo firmly to the uterus, develop from the placenta. The place where the baby clings to life in the womb is the ‘umbilical cord’. While providing your baby with oxygen and necessary nutrients throughout the entire pregnancy, it also cleans the residues.
– This week is now pumping blood
The 4 chambers of the heart have started to work.
– Outline of all major organs has been created
The lungs and brain of the embryo begin to appear. It has already begun programming itself towards lifelong learning!
– On both sides of the brain, folds appear where the ears will develop
– The cerebrospinal system gives a tail-like appearance as it develops faster than the rest of the body
– Arm and leg buds appear
While they don’t make much of an appearance this week, they feed our imaginations about the shape they’ll take in the future. It’s okay to imagine your dancing daughter or your son hitting the ball. Its size is the size of a raisin.
– Its size is the size of a raisin.

Week 6
– Embryo length is 6 mm.
– You are already starting to feel the signs of pregnancy.
– Arms and legs continue to develop
The limbs continue to grow. Get ready to feel the kicks and elbows further ahead!
– The neural tube connecting the brain and spinal canal closes.
– The brain is also developing:
Did you know that in the remaining weeks your baby will develop more than 100 trillion brain cells? This is just the beginning!
– Lenses in the eye appear at 6 weeks
When your baby is looked at with ultrasound, it is seen that he is slowly starting to take on the appearance of a newborn.
– Nostrils formed
The nose is settled in its normal position. In the next step, the nerve connections between the nose and the brain will be established!
– Intestines develop
In the first stage, the intestines begin to develop outside the body, inside the umbilical cord.
– Pancreas:
Now your baby is ready to use the sugar he needs.

7. Week
– The tail-like appearance disappears.
– Elbows are formed
Now you can see bending, breaking movements in the arms.
– Although the hands and feet are like shovels, small buds of the fingers begin to appear.
Fingers will be your baby’s first toys! Is there anything more miraculous than feeling that your baby has already left ‘footprints’ on your heart?
– The basic musculature is developed
Now the embryo is trying to move.
– Baby’s facial features are visible.
The entire face, including the mouth and tongue, becomes prominent.
– Ears, eyes and nose also begin to appear
Maybe it looks like an ‘alien’ but it will all fall into place in a short time.
Teeth begin to develop in the palate
At least for now you don’t have to deal with toothache!
– Intestines begin to develop in the umbilical cord
The number of beats per minute is 150! Twice yours!
– The basic musculature is developed
Did you know that the intestines do not form inside the body?
– The baby has its own blood type and the production of blood cells begins in the liver.

8. Week
– Your unborn baby is now called a ‘fetus’.
– The amniotic sac that protects the fetus and the amniotic fluid that fills it
The fetus begins to swim in the sac.
– The body has grown and has reached a size that takes up space.
-The head looks bigger than the body because the brain development is so fast
Brain waves are now detectable.
– The basic structure of the eye is formed
His position is already like that of a newborn!
– Teeth, palate, tongue and ear structures become prominent.
– Fingers are now well defined even though they are short and blunt as arms and legs continue to grow!
– Cartilage and bones begin to form
By the end of this week, your baby will have completed one-fifth of its journey to birth!
– Since the skin is like parchment paper, the veins can be traced.
– The intestines migrate through the umbilical cord into the abdomen.
– At the end of the 8th week, the baby’s height is measured as the ‘head-to-rump distance’
1.6 cm. The fetus, which is the size of a grape, is 1 gr. as much.

9. Week
– Now, the baby movements have started:
Even though it’s still too small for you to feel, your baby is starting to spin, wriggle, twirl!
– Many joints are now formed
Movements began to diversify. Get ready to watch the dance!
– Your baby can make grasping movements with his hands
This is awesome to watch!
– Skin fingerprints are already evident.
– Eyelids are adhered
It will stay that way until week 27.
– Average height of 2.3 cm this week. and its weight is 2 gr.

Week 10
– Your baby’s most important developmental stage is now complete
After that, be ready for the transition to the rapid growth phase.
– Your baby’s head is half its height, although it may look a bit odd
In a short time, the rest of the body parts will catch up with this development; however, the pace of brain development continues rapidly.
– The iris begins to develop
Eye color is also determined at this point.
– The placenta starts working completely from this week
The placenta is the tissue that provides all communication between the mother and the baby. While providing the nutrients to the baby, it also provides the healthy development of the baby by transmitting the leftovers to the mother.
– The heart has reached the structure in the newborn
There is fetal circulation that ‘by-passes’ the lungs.
– Hand and ankle are prominent.
– At the end of this week, the baby’s height is 3.1 cm and its weight is 4 g. as much.

11. Week
– Almost all vital structures and organs have formed and started to work.
– Fingers and toes are recognized individually
How precious are these tiny feet to you now!
– Hair and nails begin to grow.
– External sex organs begin to show genetic sex character
After a few weeks, the gender will be clearly revealed on the ultrasound! A little patience.
– With the kidneys starting to work, the amount of amniotic fluid begins to increase
This liquid, which consists mainly of water, is like a pillow that protects the baby in the mother’s womb.
– Intestines begin to contract slowly
– The head makes up half of the body.
– By the end of this week, 4 cm. tall, 7 gr. Your baby weighs in.

12. Week
– The brain is fully developed
The fetus can perceive the pain sensation.
– Vocal cords begin to form:
No doubt you can’t wait to hear her first cry!
– The eyelids cover the entire eyeball.
Thus, the very sensitive optic nerve is protected. These precious eyes are starting to get closer – I wonder who their eyes will look like?
– Ears settle into their normal positions on either side of the head.
– Started thumb sucking.
– Hair and soft nails appear.
– The intestines return completely to the abdomen.
– The liver starts to work now.
Cleaning the blood, storing nutrients and providing necessary substances is a very important milestone in the development of the baby.
– The pancreas produces insulin and the kidneys begin to produce urine.
– Guess the size of the baby? It’s exactly 5.5 cm. and 15 g.

13. Week
– If you have the opportunity to take a look inside, you can observe the respiratory movements begin.
– Cartilage tissue begins to leave its place to bone tissue
The thorax becomes prominent.
– Eyes and ears continue to develop and shift back to their normal places.
– The baby’s neck becomes prominent and the chin no longer rests on the chest wall.
– Your baby can open and close his mouth.
– Hands have become more functional
Now he starts playing with his fist.
– External genitalia almost visible
Maybe gender can be seen.
– From this week onwards, all nutrients are provided by the placenta.
– You can hear baby heartbeats with Doppler at our next visit
(Even if you can’t hear it, it will be seen clearly with ultrasound) Your baby’s heart beats much faster than you do. It is almost like in a race that will end with birth!
– 7.5 cm at the end of this week. and 25 gr. weighs.

14. Week
– It is the beginning of hormone production.
– The thyroid hormone, which will be used for the rest of his life, begins to be produced.
– In men, prostate tissue develops.
– In girls, the ovaries that begin to develop in the abdomen begin to descend into the groin.
– He’s now able to suck his thumb!
– Your baby’s bones begin to strengthen and harden!
– His skin is still very transparent.
– His entire body is covered with very fine hairs called ‘lanugo’ (from the Latin meaning ‘down’)
These continue to grow until the 26th week – Usually these hairs fall out after birth. Their job is to protect the baby’s skin in the amniotic fluid.
– The eyes slowly approach towards the middle of the face; nose and ears are prominent; cheek bones can be seen.
– Amniotic fluid 250 ml. has been up.
– Your baby is now 9 cm. and 45 gr. It has been: approximately the weight of a letter!

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