Pregnancy Process: Your Detailed Guide

Pregnancy Process by Weeks

As A Life Health Group, we are by your side at every step of your pregnancy journey. In this comprehensive guide, you will find answers to all your questions about the pregnancy process week by week. While learning about your baby's development, changes in your body, and what to watch out for each week of your pregnancy, you will also gain tips for having a healthy and happy pregnancy.

Early Weeks of Pregnancy (Weeks 1-12)

The early weeks of pregnancy are a critical period during which your baby's basic organs and systems develop. While many changes occur in your body during this time, there are also important points to pay attention to for the healthy development of your baby.

Week 1: How Is Pregnancy Calculated? What Are the First Symptoms?

Pregnancy is calculated from the first day of your last menstrual period. Therefore, during the first week of pregnancy, you may not actually be pregnant yet. However, during this week, your body is preparing for the next menstrual cycle and a possible pregnancy.

The first signs of pregnancy usually include missed periods, breast tenderness, fatigue, nausea, and frequent urination. However, these symptoms can vary in each woman, and some women may not experience any symptoms at all.

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Week 2: Ovulation and Fertilization Process

In the second week of pregnancy, a mature egg is released from one of your ovaries (ovulation). If you have sexual intercourse during this time, sperm can fertilize the egg, and pregnancy can occur.

Fertilization takes place in the fallopian tube, and the fertilized egg (zygote) moves toward the uterus.

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Week 3: Embryo Development and Implantation in the Uterus

When the fertilized egg reaches the uterus, it implants into the uterine lining called the endometrium. This process usually occurs 6-12 days after fertilization.

After implantation, the embryo begins to develop rapidly. During these weeks, your baby’s brain, spinal cord, and heart start to form.

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Week 4: Pregnancy Hormones and Changes in the Body

Levels of the pregnancy hormone hCG (human chorionic gonadotropin) increase, causing a series of changes in your body. These changes may include breast enlargement, nausea, fatigue, and emotional fluctuations.

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Week 5: Baby’s Heartbeat and First Ultrasound

Your baby’s heart begins to beat this week, and you can hear the heartbeat during the first ultrasound examination. This is an exciting moment for most expectant mothers.

The ultrasound is used to monitor your baby’s development and position within the uterus.

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Week 6: Baby’s Organ Development and Morning Sickness

Your baby’s organs continue to develop rapidly. This week, the arms and legs begin to form. Morning sickness is a common symptom during the first trimester of pregnancy.

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Week 7: Baby’s Brain Development and Nutrition Recommendations

Your baby’s brain continues to develop rapidly, and facial features begin to become more defined this week. It is important to take folic acid supplements for healthy brain development. Additionally, you should focus on balanced and healthy nutrition, drink plenty of water, and limit caffeine intake.

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Week 8: Baby’s Facial Features and Genetic Screening Tests

Your baby’s eyelids, lips, and nose become more defined. During this week, you may choose to undergo genetic screening tests. These tests are performed to assess the risk of certain genetic disorders in your baby, such as Down syndrome.

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Week 9: Baby’s Movements and Emotional Changes in the Mother

Your baby starts to move this week, although you may not feel these movements yet. Due to hormonal changes, you may become more emotionally sensitive. During this period, it is important to take time for yourself, get enough rest, and spend time with your loved ones.

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Week 10: Baby’s Gender and High-Risk Pregnancies

Your baby’s gender can be determined via ultrasound this week, although it may not always be clearly visible. If you are experiencing a high-risk pregnancy, your doctor may recommend more frequent check-ups and additional tests.

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Week 11: Baby’s Growth and Abdominal Expansion

Your baby’s size increases rapidly and is approximately the size of a lemon this week. The uterus continues to grow, and your belly may start to show slightly.

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Week 12: First Trimester Screenings and Reduced Risk of Miscarriage

First trimester screenings are performed to assess your baby’s development and possible health issues. By the end of this week, the risk of miscarriage significantly decreases.

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Second Trimester of Pregnancy (Weeks 13-27)

The second trimester of pregnancy is generally a period when expectant mothers feel better and experience increased energy levels. Your baby’s development continues rapidly, and during this time, you may begin to feel your baby’s movements.

Week 13: Baby's Bone Development and Increased Energy in the Mother

Your baby’s bones begin to harden, and the skeletal structure starts to form during this week. You may have overcome the fatigue of the first trimester and start to feel more energetic.

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Week 14: Baby’s Hearing Ability and Feeling Movements in the Womb

Your baby’s hearing ability develops, and they begin to hear sounds. During this week, especially in your second or subsequent pregnancies, you may start to feel your baby’s movements.

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Week 15: Baby’s Skin Development and Amniocentesis Test

Your baby’s skin is thin and transparent, and their blood vessels can be seen under the skin this week. You may optionally undergo an amniocentesis test. This test is performed by taking a sample of your baby’s amniotic fluid to screen for genetic disorders.

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Week 16: Baby’s Hair Development and Gender Identification

Your baby’s hair and eyebrows begin to grow. During the ultrasound examination, your baby’s gender can be identified more clearly.

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Week 17: Baby’s Immune System and Maternal Weight Gain

Your baby’s immune system begins to develop and starts receiving antibodies from the mother. During this period, your weight gain may accelerate. You should pay attention to balanced nutrition and regular exercise to ensure healthy weight gain.

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Week 18: Baby’s Sense of Taste and Prenatal Classes

Your baby’s sense of taste develops, and they can taste the amniotic fluid. You can attend prenatal classes to learn about the birth process, baby care, and breastfeeding.

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Week 19: Baby’s Sleep Patterns and Maternal Sleep Problems

Your baby’s sleep and wake cycles begin to develop. Due to your growing uterus, you may experience sleep problems. Try to establish regular sleep schedules and create a comfortable sleep environment to improve your sleep quality.

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Week 20: Baby’s Vision Development and Detailed Ultrasound Examination

Your baby’s sense of vision develops and they can perceive light. During this week, a detailed ultrasound examination is performed. In this examination, your baby’s organs and systems are thoroughly evaluated.

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Week 21: Baby’s Digestive System and Maternal Heartburn

Your baby’s digestive system continues to develop, and they begin to swallow amniotic fluid. Due to hormonal changes and the pressure of your growing uterus on your stomach, you may experience heartburn.

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Week 22: Baby’s Lung Development and Preterm Birth Risks

Your baby’s lungs begin to develop, but they are not yet ready for breathing. It is important to learn about preterm birth risks and recognize its warning signs.

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Week 23: Baby’s Fat Storage and Maternal Braxton Hicks Contractions

Your baby begins to store fat in their body. You may experience irregular uterine contractions known as Braxton Hicks contractions. These contractions are usually painless and are not a sign of labor.

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Week 24: Baby’s Growth Rate and Gestational Diabetes Screening

Your baby’s growth rate increases and by this week, the baby weighs approximately 600 grams. Gestational diabetes screening is performed. This test is conducted to assess the risk of gestational diabetes.

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Week 25: Baby’s Bone Marrow Development and Maternal Back Pain

Your baby’s bone marrow develops and begins to produce blood cells. You may experience back pain due to the pressure of your growing uterus on your back.

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Week 26: Baby’s Eyes Opening and Maternal Shortness of Breath

Your baby’s eyes open and can respond to light. You may experience shortness of breath due to your growing uterus pressing against your diaphragm.

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Week 27: Baby’s Brain Waves and Birth Preparations

Your baby’s brain waves become measurable. It is recommended to start birth preparations and to pack your hospital bag.

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Third Trimester of Pregnancy (Weeks 28-40)

During the third trimester of pregnancy, your baby prepares for birth while your body undergoes many changes. In this period, it is important to recognize the signs of labor and to prepare for the birth process.

Week 28: Baby’s Position and Signs of Labor

Your baby is usually positioned head-down. Signs of labor may include regular uterine contractions, water breaking, and vaginal bleeding.

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Week 29: Baby’s Weight Gain and Maternal Fatigue

Your baby continues to gain weight and is approximately 1100 grams this week. Due to bodily changes and sleep problems, you may feel fatigued.

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Week 30: Baby’s Lung Maturation and Maternal Edema

Your baby’s lungs continue to mature and prepare for birth. Due to fluid retention in your body, you may experience swelling (edema) in your hands, feet, and face.

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Week 31: Decreased Baby Movements and Fear of Childbirth

Your baby’s movements may decrease due to the reduced space in the uterus. As childbirth approaches, it is normal to feel anxiety and fear. You can share these feelings with your doctor or a childbirth specialist.

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Week 32: Strengthening of Baby’s Immune System and Maternal Insomnia

Your baby’s immune system strengthens and begins to receive more antibodies from the mother. You may experience insomnia due to sleep problems and frequent urination. To relax and fall asleep, you can try methods such as taking a warm shower, reading a book, or listening to soft music.

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Week 33: Baby's Positioning for Birth and Maternal Preparations

Your baby's head usually turns toward the birth canal and takes the birth position. You should complete your hospital bag and review your hospital and birth plan.

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Week 34: Baby's Skin Smoothing and Maternal Excitement

Your baby's skin becomes smoother, and the protective layer called vernix caseosa thickens. As birth approaches, feelings of excitement and anxiety may increase. Sharing these emotions with your loved ones and receiving support will make you feel better.

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Week 35: Baby's Preparation for Birth and Maternal Check-Ups

Your baby's organs and systems are fully developed for birth. Your doctor may perform more frequent check-ups to monitor your baby's development and birth position.

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Week 36: Baby Positioning for Birth

Your baby's head settles into the birth canal and takes the most suitable position for delivery. During this period, it is important to carefully monitor your baby's movements and inform your doctor if you notice any changes.

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Week 37: Approaching Birth and Maternal Symptoms

You are now in the period when birth is approaching, and you may experience some symptoms. These symptoms include the mucus plug discharge, water breaking, lower back pain, and regular uterine contractions.

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Week 38: Onset of Labor and When to Go to the Hospital

Labor begins with regular and increasingly frequent uterine contractions. If your water breaks or you experience vaginal bleeding, you should go to the hospital immediately.

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Week 39: Labor Process and Vaginal Birth

Vaginal birth is the delivery of the baby through the birth canal with uterine contractions. The labor process can vary for each woman and may last from a few hours to up to a day.

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Week 40: Cesarean Delivery and Postpartum Care

If vaginal delivery is not possible or if there is a medical necessity, a cesarean delivery may be performed. Cesarean delivery is the birth of the baby through an incision made in the abdominal area. In the postpartum period, it is important to carefully monitor the health of both the mother and the baby.

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Nutrition During Pregnancy

Eating a healthy and balanced diet during pregnancy is very important for both your health and your baby’s health. During pregnancy, you need to take in all the nutrients your baby needs for proper development. Therefore, it is essential to follow a varied and balanced nutrition plan.

Protein: Protein is necessary for the development of your baby’s tissues and organs. Good sources of protein include meat, fish, eggs, dairy products, legumes, and nuts.
Calcium: Calcium is important for your baby’s bone and tooth development. Good sources of calcium include dairy products, green leafy vegetables, almonds, and dried figs.
Iron: Iron is essential for the production of your baby’s blood cells. Good sources of iron include red meat, legumes, green leafy vegetables, and dried fruits.
Folic Acid: Folic acid plays a crucial role in the development of your baby’s brain and spinal cord. Good sources of folic acid include green leafy vegetables, legumes, orange juice, and grains.
Omega-3 Fatty Acids: Omega-3 fatty acids are important for your baby’s brain and eye development. Good sources of omega-3 fatty acids include fish, walnuts, flaxseeds, and chia seeds.

During pregnancy, you should avoid caffeine and alcohol, limit processed foods, and drink plenty of water. You should also regularly take the vitamin and mineral supplements recommended by your doctor.

Exercise During Pregnancy

Regular exercise during pregnancy is beneficial for both your health and your baby’s health. Exercise can help reduce risks such as gestational diabetes, preeclampsia, and preterm birth. It can also help you prepare for the birthing process and speed up your postpartum recovery.

Exercises you can do during pregnancy include walking, swimming, yoga, and Pilates. It is important to consult your doctor before starting your exercise program.

Frequently Asked Questions During Pregnancy

How much weight should I gain during pregnancy?
Weight gain during pregnancy varies based on your pre-pregnancy weight and body mass index. Generally, a weight gain of 11-16 kg is recommended for a healthy pregnancy.

Which foods should I avoid during pregnancy?
During pregnancy, you should avoid raw meat and seafood, raw eggs, unpasteurized milk and cheeses, liver and liver products, as well as foods and drinks containing alcohol and caffeine.

What symptoms are normal during pregnancy?
Nausea, fatigue, breast tenderness, frequent urination, back pain, and constipation are normal symptoms during pregnancy. However, if you experience severe abdominal pain, vaginal bleeding, fever, or your water breaks, you should contact your doctor immediately.

How will I know when I’m going to give birth?
It is not possible to predict the exact date of birth. However, your doctor can monitor your baby’s development and birth position to give you an estimated due date.

What should I pay attention to during the postpartum period?
During the postpartum period, you should focus on resting, eating healthy, and drinking plenty of water. You should also learn about your baby’s care and seek support for breastfeeding.

A Life Health Group Contact Information

As A Life Health Group, we are happy to support you throughout your pregnancy journey. Please feel free to contact us with any questions or concerns.

Remember, we are here to help you have a healthy and happy pregnancy!

Prepared by A Life Medical Editorial Board.

Last Updated: 6 Kasım 2025 14:05

Publish Date: 6 Kasım 2024 00:10

Pregnancy Process: Your Detailed Guide

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