孕期每週指南

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.

第11周是您即将结束孕早期（前三个月）的过渡阶段。此时，宝宝的生长发育正在加速，而您也会开始逐渐感到精力充沛。您的宝宝现在大约有青柠（4-5厘米）大小。

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.

欢迎来到孕第14周！您现在已经正式进入了被称为怀孕“黄金时期”的孕中期。前三个月那些疲惫、恶心和充满挑战的日子大部分已经过去。本周，您的宝宝大约有一个柠檬那么大（8.9厘米 / 42.5克），面部肌肉和肾脏等重要器官正在持续发育。现在是时候恢复活力，好好享受这一重要的成长阶段了。

第15周正处于孕期著名的“蜜月期”之中。您的宝宝现在大约有苹果或橙子那么大，身长约10厘米，正开始在肚子里探索世界。在这一阶段，宝宝的骨骼系统发育加速，动作也变得更加协调。对您来说，本周是一个美妙的时期，怀孕的迹象在身体上变得更加明显，而您的精力依然充沛。

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.

欢迎来到第17周！宝宝现在大约有一个大石榴（约13厘米）那么大。本周，宝宝的身体开始储存脂肪，这正是在为那些可爱的小肉褶打基础。对您来说，这段时间胃口会变好，精力也十分充沛，但可能会开始感到轻微的腰痛。

欢迎来到第18周！本周您将进入孕期最重要的里程碑之一：大排畸检查阶段。您的宝宝现在大约有一块红薯那么大。现在宝宝已经能清晰地听到您的声音了，还会在肚子里吮吸自己的小手指呢。

欢迎来到第19周！您的孕期已经快过半了。宝宝现在大约有一个大芒果或西红柿那么大（约15厘米）。本周，宝宝的皮肤开始覆盖上一层被称为胎脂（verniks kazeoza）的特殊物质，以起到保护作用。对您来说，这段时间食欲会有所增加，但腰痛和烧心的感觉可能会变得更加明显。

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.

欢迎来到第21周！恭喜你，你已经走过了一半的旅程，正式进入了孕期的下半场。你的宝宝现在大约有一根大胡萝卜那么大。本周，宝宝的消化系统正在继续发育，而你也会开始更清晰、更有节奏地感受到宝宝的胎动。

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.

第23周是孕期中一个非常关键的里程碑。在医学上，这一周被视为生存能力（viability）的起点，意味着宝宝开始具备适应子宫外世界的能力。您的宝宝现在身长约29厘米，体重约500克，大小相当于一个茄子或一个大芒果。

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.

第25周，您正接近孕中期的尾声。宝宝正在快速增加体重，并开始对外界刺激做出反应。目前宝宝的身长约 34.6 厘米，体重约 660 克，大小约等于一颗 花椰菜。在这个阶段，宝宝的 肺部 及其内部血管正在加速发育，为将来适应外界环境做准备。

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).

第28周标志着孕期正式进入孕晚期。这是一个关键的里程碑，宝宝现在的存活能力已经非常高，您的身体也开始为分娩做准备。现在，宝宝的大小大约像一个大茄子。

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.

第32周标志着怀孕马拉松的最后冲刺阶段，这是一个兴奋与身体负担并存的特殊时期。恭喜你，已经走过了大部分路程！本周，你的身体正在为分娩做最后的准备，随着子宫的扩张，腹部会感到比以往更加紧绷。对于宝宝来说，这一周是储备能量与发育成熟的关键期。现在，宝宝已经长到了西葫芦（约42厘米）大小，脑细胞之间的连接正以极快的速度建立，而免疫系统也正通过你建立起对抗外界的第一道防线。进入第32周，前期的准备工作逐渐变成了满怀期待的等待，时间仿佛流逝得既快又慢。

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.