Expectant parents are wondering what their baby’s development looks like week by week. An exciting journey that will last 40 weeks, that is, 9 months and 10 days, begins. At the end of this journey, family members will multiply.
From the beginning of pregnancy, there will be physiological and psychological changes in the lifestyle. You can follow the development and change moments from the first week of pregnancy to the birth process.
In the first two weeks of pregnancy, your hormones start to work rapidly, ovulation occurs. Meanwhile, menstrual bleeding may continue. The body begins to secrete “follicle stimulating hormone”. Towards the end of the second week, “luteinizing hormone” is secreted in the body, and as a result, the follicle leaning against the wall of the ovary is torn and the egg is thrown into the abdominal cavity.
In the third week of pregnancy; egg cell unites with sperm cell. After the sperm enters the egg, the sperm combine with their genetic material of 23 chromosomes and a cell with 46 chromosomes is formed. If the sperm reaching your egg carries the X chromosome, your baby is a girl, and if it has a Y chromosome, your baby is a boy.
By the 4th week of pregnancy, all your baby’s organs begin to develop and work. This period is the most important and risky period of pregnancy. This process continues for the next 6 weeks.
In the 5th week of pregnancy, the baby reaches the size of a sesame seed. This week, your baby’s brain begins to grow and develop. Symptoms such as pale skin, nausea, fatigue and frequent urination may occur this week.
In the 6th week, the baby’s heart and the right and left parts of the heart are formed. Reaching the size of a lentil, the baby’s heart begins to beat. During this week, the baby develops slowly, and his hands, feet and fingers may look like protruding buds. During these weeks, expectant mothers may find themselves in emotional turmoil.
In the 7th week of pregnancy, the baby’s elbows and joints become prominent, and the fingers and toes become slightly visible. His teeth and the inside of his mouth take shape. Their ears continue to develop. Facial lines are formed gradually.
At 8 weeks, that is, in the 2nd month, the baby’s height has reached 1.5 cm. Bean-sized baby’s hands, toes and arms are getting longer. Knees and elbows are forming. In this process, visible changes may occur in your body, such as swelling of the breasts. You may want to avoid certain foods and drinks this week. There may be an increase in complaints such as nausea, constant desire to sleep, tension and vomiting.
By the 9th week of pregnancy, the baby’s height reaches almost 2.4 cm. Ear development will be completed by the end of this week. His upper lip is fully formed, his mouth, nose and nostrils become more prominent. This week, the baby’s heart is divided into 4 parts and the heart valves are starting to develop. In the 9th week, you may feel excessive gas and bloating.
By the 10th week, the baby reaches the size of a tangerine. After this period, the tissues and organs in the baby’s body are growing rapidly. The period called the fetus begins. The liver, kidneys, intestines, brain and lungs are taking shape. Although they will continue their development throughout pregnancy, they are starting to work.
At the 11th week of pregnancy, the baby comes to the size of a fig. The baby is already kicking and stretching intensely. As his body grows and becomes more functional, there will be an increase in these movements.
At 12 weeks, your baby is the size of a lime. Her face is getting more and more defined. Baby has many reflexes this week, including sucking. But it’s hard to feel the baby’s movements for a few more weeks. Your waist circumference may become thicker this week.
By the 13th week, your belly will announce that it will herald a baby. The baby’s body will be well formed. The baby will have completed most of its critical development and the risk of miscarriage will be greatly reduced. Nausea subsides during these weeks.
At the 14th week of pregnancy, the baby’s critical period is coming to an end. The baby takes about the size of a lemon. At the end of this week, the baby’s arms are getting longer and becoming proportional to the rest of the body. This week he can hold things, suck his thumb. By the 14th week of pregnancy, symptoms such as nausea, fatigue and chest tightness ease.
When it comes to the 15th week; the baby reaches a height of about 9.6 cm. This week, the baby’s taste buds are starting to form.
In the 16th week of pregnancy, body systems are working, including the circulatory and excretory system. The shape of his head began to become evident. Do not be surprised at the compliments you will receive as the pregnancy glow will increase during these weeks.
At 17 weeks, the baby gets the size of an onion. The baby can move his joints and skeleton this week. His skeleton, which has been rubbery cartilage to this day, turns into bone.
At 18 weeks, the baby’s height is about 13 cm. You may experience an increase in appetite during this week of pregnancy. Skipping meals is very dangerous during pregnancy.
By the 19th week of pregnancy, the baby’s arms and legs become proportional to the rest of the body. This week, the hair on the scalp is starting to grow. Your baby’s brain is identifying areas for smell, taste, hearing, sight and touch this week. Your baby can hear what’s going on during these stages. This week, you may feel a pain in your lower abdomen or a quick, sharp, stabbing pain for a week or two at the end of an active day, especially when you change positions.
By the 20th week, half of the pregnancy is over. The baby is about 300 grams and 15.5 tall. Until this time, the part from the baby’s head to the bottom of the baby was measured. The reason for this is that the baby’s legs are bent, which makes it difficult to measure.
At 21 weeks, the baby’s eyes and eyelids are fully developed. Baby can be very active these weeks. You can feel its movements easily.
At the 22nd week of pregnancy, your baby’s eyes, eyelids and lips are becoming more pronounced, with a length of 26 cm and a weight of about 450 grams. During these weeks, stretch marks may occur as your abdomen becomes more pronounced.
At 23 weeks, your baby’s face is red and wrinkled. This will turn a pink or reddish color after birth. This is because of the blood vessels visible through her transparent skin.
In the 24th week of pregnancy, the baby’s sense organs are developing well. During these weeks, your baby may hear more and may even be startled by sudden and loud sounds. Abdomen reaches the size of a soccer ball. Symptoms such as dry eyes may occur in expectant mothers. This is quite normal. Moisturizing the eyes is very important to alleviate this discomfort.
By the 25th week of pregnancy, the baby reaches 32.5 cm in length and 775 grams in weight. As the baby gains weight, the wrinkled skin becomes flatter. You may have shine in your hair this week of pregnancy. You may encounter dark and thick hair on your body. All this will pass after birth.
At 26 weeks pregnant, your baby weighs more than 800 grams and is 33.5 cm long. After these weeks, there may be a gradual increase in blood pressure. You should pay attention to hand and face swelling, sudden weight gain (due to water retention), blurred vision, seeing spots before your eyes, sudden, severe and persistent headaches or pain in the upper abdomen. If you experience these symptoms, contact your doctor. You may experience constipation during these stages of pregnancy.
By week 27, your baby is starting to fully fill your womb. This week, the baby can open and close his eyes. He can sleep and wake up at regular intervals and can suck his fingers. As you approach the end of your pregnancy, you may experience some symptoms such as back pain.
At 28 weeks, your baby’s height is 35 cm and its weight is 900 grams. It is believed that during these weeks the personality of the baby is formed. The development of the lung in terms of structure and function continues. In case of premature birth, the probability of survival of the baby increased.
The baby reached 1100 grams at 29 weeks. Its height is approximately 36.5 cm. This week, the baby’s sense perceptions are fully developed. Fat layers continue to form and their nails bud.
At the 30th week of pregnancy, the baby’s height is 38 cm and its weight is 1300 grams. At this stage, the baby’s brain development is very fast and the head is getting longer. The baby’s eyelids open and close regularly.
At 31 weeks, the baby’s height is 39 cm and its weight is 1500 grams. After this process, the baby’s development slows down a bit, but the brain development continues. In this week, the baby can see, separate the light from the dark, and blink. The baby’s mobility will decrease even more because the space occupied by the uterus has increased and the range of motion has narrowed.
At the 32nd week of pregnancy, the baby’s height reached 40 cm and its weight reached 1800 grams. As the baby continues to develop, the range of motion in the uterus narrows. The fatty tissues under the skin develop and the baby’s color changes from red to pink.
In the 33rd week of pregnancy, that is, in the 8th month, the baby is 2000 grams and 41 cm. Along with the development of the baby’s brain, the size of the head also changes. The baby practices breathing during these weeks.
At 34 weeks, the baby’s height is 42.5 cm and its weight is 2250 grams. The baby consumes plenty of fluids during these weeks, so expectant mothers should pay attention to their fluid intake and not dehydrate their body. The baby’s head is not soft and fused, which facilitates delivery.
At 35 weeks, the baby grows by 1 cm and gains another 250 grams. Weight gain continues due to the increase in fat in the baby’s body. All organs have been formed, but some retouching has begun. Due to the lack of space in the uterus, the baby’s movements have become difficult.
By the 36th week of pregnancy, the baby is 45 cm tall and weighs 2900 grams. In this week, the baby’s body is well filled. Wrinkles on the baby’s face disappear as fat is now stored on the cheeks. His head is tapering.
By the 37th week, the baby’s body is well formed. The baby’s nails, whose brain development continues rapidly, now grow up to the fingertips. The baby has become responsive to light.
As the pregnancy neared its end, the baby’s weight gain slowed, and the diameter of its head equaled the diameter of its abdomen. At 38 weeks, the baby reached 48 cm and 3200 grams.
In the 39th week of pregnancy, the baby falls asleep very often. This week the baby is 49 cm and 3300 grams.
It’s the baby’s birthday. At 40 weeks, you can hold your baby in your arms. However, in some cases, delivery may be delayed up to 42 weeks.