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A Week-by-Week Pregnancy Development Guide with Pictures

A Week-by-Week Pregnancy Development Guide with Pictures

Last updated on March 5th, 2024 at 07:00 pm

Table of Contents

Pregnancy is an incredible journey filled with unique stages and milestones. To help you navigate this beautiful experience, we’ve created a week-by-week pregnancy development guide. Whether you’re curious about fetal development, changes in your body, or simply want to see pictures of your growing baby, this guide has you covered. Let’s embark on this incredible journey together, from week 1 to week 40.

Week 1 of Pregnancy – The Beginning

At week 1, you may not even realize you’re pregnant. This is the time of conception when your body prepares for the amazing journey ahead.

Week 2 of Pregnancy – The Miracle of Life

Your baby’s gender and physical traits are determined this week, although you won’t know it yet.

Week 3 of Pregnancy – Conception

Week 03

The fertilized egg travels down the fallopian tube and begins to divide, forming a blastocyst.

Week 4 of Pregnancy – Implantation

Week 4

The blastocyst attaches to the uterine lining, signaling the beginning of pregnancy.

Week 5 of Pregnancy – Embryonic Development Begins

Week 5

The embryo’s heart starts to beat, and its neural tube begins to form, which will later become the brain and spinal cord.

Week 6 of Pregnancy – First Ultrasound

Week 6

At this stage, you might have your first ultrasound to confirm the pregnancy and hear the baby’s heartbeat.

Week 7 of Pregnancy – Facial Features Emerge

Week 7

Your baby’s facial features, such as the eyes and nose, begin to develop, though they’re still tiny.

Week 8 of Pregnancy – Fingers and Toes

Week 8

Tiny fingers and toes are forming, and your baby starts making spontaneous movements.

Week 9 of Pregnancy – Pregnancy Symptoms

Week 9

Many women start experiencing pregnancy symptoms like morning sickness during week 9.

Week 10 of Pregnancy – Baby’s First Picture

Week 10

You might have an ultrasound around this time, and your baby’s first picture is taken.

Week 11 of Pregnancy – Growing Rapidly

Week 11

Your baby is growing rapidly, and you may start to notice changes in your body.

Week 12 of Pregnancy – End of the First Trimester

Week 12

The first trimester ends, and you can proudly announce your pregnancy to the world.

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Week 13 of Pregnancy – Baby’s Development

Week 13

Your baby’s organs are forming, and you may get to see your little one’s first ultrasound pictures.

Week 14 of Pregnancy – The Bump Appears

Week 14

Many women start to show a baby bump around week 14.

Week 15 of Pregnancy – Gender Reveal

Week 15

Around this time, you may be able to find out your baby’s gender through ultrasound.

Week 16 of Pregnancy – Feeling the Flutters

Week 16

Some women start feeling their baby’s movements, often described as “butterflies.”

Week 17 of Pregnancy – Developing Senses

Week 17

Your baby’s senses, like hearing and sight, are developing.

Week 18 of Pregnancy – Baby’s First Kicks

Week 18

You’ll likely feel your baby’s first kicks during this week.

Week 19 of Pregnancy – Pregnancy Glow

Week 19

Many women experience a “pregnancy glow” as their skin becomes more radiant.

Week 20 of Pregnancy – Halfway There

Week 20

You’re halfway through your pregnancy, and it’s time for the anatomy scan.

Week 21 of Pregnancy – Rapid Growth

Week 21

Your baby is rapidly growing and gaining weight.

Week 22 of Pregnancy – Fetal Movement

Week 22

Your baby’s movements become more pronounced, and you may even see kicks from the outside.

Week 23 of Pregnancy – Viability Milestone

Week 23

Your baby reaches a significant milestone – the age of viability.

Week 24 of Pregnancy – Baby’s Hearing

Week 24

Your baby’s hearing is fully developed, and they can hear your voice.

Week 25 of Pregnancy – Ultrasound Delight

Week 25

Time for another ultrasound to see how much your baby has grown.

Week 26 of Pregnancy – Breathing Practice

Week 26

Your baby practices breathing movements in preparation for life outside the womb.

Week 27 of Pregnancy – Fetal Development

Week 27

By week 27, your baby is well-developed, and you might have amazing ultrasound pictures.

Week 28 of Pregnancy – Lung Development

Week 28

Your baby’s lungs continue to mature, preparing for that first breath.

Week 29 of Pregnancy – Baby’s Growth Spurt

Week 29

Your little one goes through a growth spurt, and you may feel it with increased movement.

Week 30 of Pregnancy – Countdown to Birth

Week 30

You’re in the final trimester, and the countdown to your baby’s arrival begins.

Week 31 of Pregnancy – Pregnancy Symptoms

Week 31

As you enter the last stretch, you might experience more intense pregnancy symptoms.

Week 32 of Pregnancy – Baby’s Weight Gain

Week 32

Your baby is gaining weight rapidly now, preparing for life outside the womb.

Week 33 of Pregnancy – Baby’s Senses

Week 33

Your baby’s senses, such as taste and smell, are developing further.

Week 34 of Pregnancy – Preparing for Birth

Week 34

Your baby’s position in the uterus may start to change as they prepare for birth.

Week 35 of Pregnancy – Braxton Hicks Contractions

Week 35

Braxton Hicks contractions might become more noticeable as your body prepares for labor.

Week 36 of Pregnancy – Baby’s Positioning

Week 36

Your healthcare provider will check to see if your baby is in the right position for birth.

Week 37 of Pregnancy – Full-Term Pregnancy

Week 37

Congratulations, you’ve reached full term! Your baby can arrive anytime now.

Week 38 of Pregnancy – Baby’s First Poop

Week 38

Your baby’s digestive system is working, and they produce their first meconium.

Week 39 of Pregnancy – Signs of Labor

Week 39

Be on the lookout for signs of labor, as your baby’s arrival is imminent.

Week 40 of Pregnancy – Due Date

Week 40

It’s your due date! Your baby may choose to arrive right on time or make you wait a bit longer.

Beyond Week 40 – Patience

If your baby hasn’t arrived yet, remember that every pregnancy is unique, and patience is key.

Your pregnancy journey is a remarkable and transformative experience. Use this guide to track your baby’s development and cherish every moment of this incredible adventure. Remember, each week brings new milestones and discoveries as you prepare to welcome your little one into the world. Enjoy every moment of your pregnancy!


American Pregnancy Association

What to Expect

Cleveland Clinic – Pregnancy

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