Pregnancy week by week

Week 1 is the invisible beginning of your pregnancy journey, where the foundation is being laid. Technically, conception hasn't occurred yet; your body is simply preparing for a potential pregnancy. The uterine lining is renewing itself, hormones are balancing, and preparations for the ovulation process are underway. You may not feel pregnant or notice any symptoms, but your body is quietly preparing for an incredible journey.

Week 2 is biologically the week of the "Big Meeting," meaning fertilization takes place. Technically, you are still at the very beginning of your pregnancy, but the most important date of the century is about to happen inside your body.

Week 3 is one of the most mysterious, microscopic, yet vital weeks of your pregnancy journey. This week, the fertilized egg divides rapidly as it travels toward the uterus to implant itself. You may not be 100% sure you are pregnant yet, but a big settling-in plan is already in motion inside.

Week 4 is a significant milestone as your pregnancy journey officially begins, often confirmed by a missed period. Your baby is currently the size of a poppy seed (1-2 mm). Now classified as an embryo, this developing life is securely attached to the uterus to continue its growth.

Week 5 is when pregnancy starts to feel real. At this stage, your baby is about the size of a poppy seed (2 mm). It is no longer just a line on a test strip; you are in a process of change that resonates through every cell of your body. Your baby’s heart begins its first beat this week!

Week 6 is an exciting milestone in your pregnancy journey where things start feeling more real, and you may even see your baby’s heartbeat for the first time. Now about the size of a sweet pea (5-6 mm), your baby’s facial features and organs are beginning to take shape. Meanwhile, your body is going through significant hormonal changes to welcome its new guest.

Week 7 is a time when your baby’s development gains momentum and you begin to feel these physical changes more intensely. Your baby has doubled in size since last week! They are now about 10 mm long, which is roughly the size of a blueberry.

Week 8 is one of the most important milestones of your pregnancy. Your baby is technically preparing to transition from the embryo stage to the fetus stage. While your baby, now about the size of a raspberry (1.6 cm), continues to develop their heart and brain rapidly, this week may be a time when pregnancy symptoms like nausea and fatigue peak, testing your patience.

Week 9 is a major milestone in your pregnancy journey because your baby is now medically transitioning from an embryo to a fetus. While your baby’s development continues rapidly, reaching about the size of a grape (2.3 cm), you may feel pregnancy symptoms most intensely during this period as hCG hormone levels peak. Hang in there; the relief of the second trimester is just around the corner!

Week 10 is an incredible week, often considered a critical milestone in pregnancy. Your baby has reached about 30 mm in size, roughly the size of a plum. Almost all of their vital organs have finished forming, and they are now moving from the construction phase to the growth and maturation phase. For you, this is a time when clothes start feeling a bit tight and your pregnancy begins to show.

Week 11 is a bridge week as you approach the end of the First Trimester. Your baby’s development is accelerating, and you will gradually start to feel more energetic. Your baby is now about the size of a lime (4-5 cm).

Week 12 is like a graduation week in your pregnancy journey. Congratulations! You have reached the end of the first trimester. This week, your baby has reached the size of a lime (5.4 cm). It is a very special period where you may feel a great sense of relief both physically and emotionally, as development now enters the maturation phase. With the end of this week, you will successfully complete your first trimester! Your baby is now fully ready and starting their growth marathon.

Week 13 opens the door to a brand new phase in your pregnancy journey. You have now officially entered the second trimester — congratulations! Your baby has reached the size of a lemon (about 7-8 cm) this week. This is a transition week where your body adapts better to pregnancy, your energy slowly begins to return, and most expectant parents start to feel more balanced. For your baby, it is now a time of rapid growth and strengthening. The vital organs are all in place; now, the details and fine-tuning begin. Movements are increasing, reflexes are developing, and that tiny body is becoming more defined every day. With week 13, pregnancy becomes more fluid; morning sickness may decrease, emotions may settle, and the enjoyable parts of this journey start to be felt more deeply. You are no longer just moving forward — you are growing.

Welcome to week 14! You are now officially in the second trimester, known as the golden age of pregnancy. The tiring, nauseous, and challenging days of the first three months are mostly behind you. As your baby reaches about the size of a lemon (8.9 cm / 42.5 grams) this week, vital structures like facial muscles and kidneys continue to develop. Now is the time to regain your energy and enjoy this important stage of development.

Week 15 is right in the middle of that famous honeymoon phase of pregnancy. Your baby is now the size of an apple, measuring about 10 cm long, and is starting to explore their world inside. During this time, your baby's skeletal system develops rapidly, and their movements become more coordinated. For you, this week is a wonderful time when pregnancy feels more physically real, yet your energy levels remain high.

Week 16 is a major highlight of your pregnancy journey. At this stage, you may begin to feel your baby’s first movements, which are often described as light flutters or bubbles. Your baby is now the size of an avocado and is moving energetically, measuring approximately 11-12 cm in length.

Welcome to week 17! Your baby is now the size of a large pomegranate (about 13 cm). This week, your baby’s body is starting to store fat, which means the foundation for those famous, cute baby rolls is being laid. For you, this is a time when your appetite increases and energy peaks, but lower back pain might start to make itself felt.

Welcome to week 18! This week, you are entering the period for the Anatomy Scan, one of the biggest milestones of pregnancy. Your baby is now the size of a sweet potato. They can now clearly hear your voice and spend time sucking their tiny fingers inside.

Welcome to week 19! You are almost halfway there. Your baby is now the size of a large mango (about 15 cm). This week, your baby’s skin is starting to be covered by a special substance called vernix caseosa to protect it. For you, this is a time when your appetite increases, but back pain and heartburn might become a bit more noticeable.

Congratulations! You have reached the halfway point of your pregnancy. Week 20 is a major milestone where your baby is now the size of a banana. You will notice their movements are evolving from tiny flutters into distinct kicks as they grow stronger. This is an important time for both celebration and monitoring your baby’s health in detail.

Welcome to week 21! Congratulations, you have passed the halfway point and are now starting the second half of your pregnancy journey. Your baby is currently about the size of a large carrot. While your baby’s digestive system continues to develop this week, you will also begin to feel their kicks much more clearly and rhythmically.

Welcome to week 22! Your baby is now about 14-15 cm long, roughly the size of a coconut or a papaya. This week, your baby’s appearance is like a miniature version of how they will look at birth. For you, it is an interesting phase where your appetite increases, but you may also start experiencing forgetfulness and clumsiness, often called pregnancy brain.

Week 23 is a major milestone in your pregnancy journey. In medical terms, this week is considered the start of the age of viability, when your baby begins to gain the ability to survive outside the womb. Your baby is now about 29 cm long and weighs 500 g, roughly the size of an eggplant or a large mango.

Week 24 is a wonderful week as you approach the end of your second trimester and your baby has now reached the size of an ear of corn. This week marks a medical milestone with the start of the glucose screening test period, while your baby’s lungs speed up their development to prepare for the outside world.

Week 25 marks the approach of your second trimester's end. Your baby is gaining weight rapidly and starting to react to the outside world. Your baby is now about 34.6 cm long and weighs 660 grams, which is roughly the size of a cauliflower. During this stage, your baby’s lungs and blood vessels continue to develop as they prepare for life outside the womb.

Welcome to week 26! You are nearing the end of your second trimester. Your baby is now about 35 cm long. The biggest highlight in your baby's world this week is finally opening their eyes!

With week 27, you are entering the Third Trimester, the most exciting and final stretch of your pregnancy. This week is a medical and biological milestone, as your baby’s chance of survival in the outside world has now risen above 90%. Your baby is now about the size of a cauliflower or a large head of lettuce (approximately 36.6 cm / 875 grams).

Week 28 officially marks the start of your third trimester. This week is a major milestone as your baby’s chance of survival is now very high, and your body begins practicing for labor. Your baby is currently about the size of a large eggplant.

Week 29 is an exciting stage as you move deeper into the third trimester and prepare for the grand finale of your pregnancy. This week, your baby has reached the size of a butternut squash or a large cauliflower (about 38-39 cm and 1.1-1.2 kg), and you may begin to feel the physical weight more clearly. Every movement becomes more meaningful, and every preparation feels more real. For your baby, this is a week of perfecting survival skills. While their lungs gear up to breathe the air of the outside world, their brain continues to weave a complex network with billions of new neurons. They are no longer just a growing life inside you; they are a tiny individual with their own character, reacting to light, sound, and even the flavors of the food you eat. Your body, meanwhile, moves into a mode of preserving its reserves. As your blood volume approaches its peak, your heart and lungs work harder than ever. Week 29 is a time when patience, physical endurance, and the silent bond you share with your baby are felt most strongly. You have traveled most of the way; now, each passing day brings you one step closer to the miracle.

Week 30 is a time when you are approaching the final stretch of your pregnancy journey and preparations are becoming more serious. Your baby is now as heavy as a large cabbage and is about 40 cm long. This week is a stage where your baby begins to react to the outside world not just physically, but mentally as well. For you, while managing increasing back pain and sleeplessness, the countdown to the day you hold your baby is picking up speed. Every kick is now stronger, and every movement is felt more clearly.

Week 31 marks a significant period in the third trimester as the countdown to delivery becomes more tangible. You have successfully navigated the majority of your pregnancy. This week is a crucial filling-out phase for both you and your baby. Your bump is now much more prominent, and while your physical activity might have slowed, your mind is likely occupied with thoughts of your baby's arrival. For your baby, this week involves major advancements in perceiving the world. They are refining their five senses in preparation for life outside the womb. While brain connections develop at a rapid pace, fat stores are accumulating to give them a fuller baby shape. Pregnancy reaches a higher physical intensity during week 31. You may experience shortness of breath, abdominal pressure, and sleeplessness; however, every strong kick is a sweet reward that reminds you of the purpose of this journey. You are nearing the end now, and each day brings you one step closer to the miracle you will soon hold in your arms.

Week 32 marks the final stretch of your pregnancy journey, a significant phase where physical changes and anticipation converge. Your body is now making essential preparations for birth, and your abdomen may feel increasingly tight as the uterus expands. For your baby, this period is dedicated to growth and maturation. Now measuring approximately 42 cm, your baby is the size of a squash. At this stage, brain cell connections are forming rapidly, and the immune system is establishing its first line of defense by acquiring antibodies from you. With week 32, the focus shifts toward the final countdown as you prepare for your new arrival.

Week 33 is a stage in the final stretch of your pregnancy where your baby is nearly ready for the outside world, though space inside the womb is getting quite tight. This week, your baby is about the size of a pineapple. While your body performs important rehearsals for birth, your baby’s immune system and bone structure are beginning to reach their strongest form.

As you enter week 34, you are in the final stretch of your pregnancy journey. Your baby has grown to the size of a cantaloupe and weighs approximately 2100 - 2300 grams. Reaching this week is a major medical milestone, as babies born now typically adapt well to life outside the womb with medical assistance and face minimal risks of long-term health complications.

Welcome to week 35! You are now in the final stretch of your pregnancy, with birth only a few weeks away. Your baby is approximately 46 cm long and weighs 2400 grams, which is about the size of a honeydew melon. Although your baby’s physical development is nearly complete as they prepare for the outside world, you may feel your body getting heavier during this time.

Welcome to week 36! Your pregnancy has now reached the early term stage, meaning the risk of preterm birth has passed. Your baby, now approximately the size of a head of lettuce, is busy completing final preparations for birth as your due date approaches.

Welcome to week 37! Congratulations, your pregnancy is now medically considered early term. This means your baby's organs are developed enough to survive in the outside world without assistance, and labor could start at any moment. Your baby is now about 48.5 cm long and weighs 2.85 kg, roughly the size of a bunch of Swiss chard or a large melon.

Week 38 marks a major milestone as your pregnancy is now full-term, and labor could begin at any moment. Your baby is fully developed and ready for birth, measuring approximately 50 cm and weighing 3100 grams—roughly the size of a watermelon. This week, your body is entirely focused on the final preparations for delivery.

Welcome to week 39! You have officially reached full term. Your bags are likely packed and waiting by the door as you enter the final stretch, with only days or perhaps even hours left until you meet your baby. Your little one is now about the size of a watermelon, weighing around 3300 grams and measuring 50 cm long, and is completely ready for the outside world.

Week 40 is the official finish line of your pregnancy journey, and your due date has finally arrived. This week, your baby has fully completed their development and is ready to enter the outside world at any moment. For you, it is a time when excitement and anticipation reach their peak. Your baby is now about the size of a pumpkin or a large watermelon.

Week 41 is a stage in your pregnancy journey where your expected due date has passed, a phase medically known as being post-term that requires a little extra patience. Your baby is now about the size of a watermelon and, although they are fully ready for life outside the womb, they haven't quite given up their cozy home just yet.

Week 42 is the final stage of pregnancy, known as post-term or overdue. This medical milestone marks exactly two weeks past your due date, a time when clinical monitoring becomes essential. Your baby is now about the size of a large watermelon and has completed their final preparations to enter the outside world from the womb.