Introduction

Being a new mom can be an exciting but overwhelming experience. You might have a lot of questions about your baby’s development and milestones. In this article, we will take you through the baby development process week by week, from the first week of pregnancy until your baby’s first birthday. So, let’s get started!

First Trimester (Weeks 1-12)

During the first trimester, your baby is growing rapidly. By the end of the third month, your baby’s organs, muscles, and bones will have formed. Your baby’s gender can be identified during this period, but they are still small and fragile.

Week 1-2:

The first two weeks of pregnancy are the weeks leading up to conception. During this time, your body is getting ready for the pregnancy.

Week 3-4:

During week three, your baby’s brain and spinal cord will begin to form. By week four, your baby is the size of a poppy seed.

Week 5-6:

Your baby’s heart will begin beating during week five, and by week six, they will be the size of a lentil. Their eyes, nose, and ears will begin to form.

Week 7-8:

Your baby’s hands and feet will begin to form during week seven. By week eight, they will be about the size of a raspberry. Your baby’s face will start taking shape, and they will start to move around.

Week 9-10:

During week nine, your baby’s arms and legs will start to move. By week ten, they will be about the size of a strawberry. Their vital organs, such as the liver and kidneys, will begin to function.

Week 11-12:

Your baby’s bones will begin to harden during week eleven, and by week twelve, they will be about the size of a lime. Your baby will start to grow hair and nails.

Second Trimester (Weeks 13-28)

The second trimester is often considered the “honeymoon phase” of pregnancy. Your baby is growing and developing, and you will start to feel them move around.

Week 13-14:

Your baby’s vocal cords will start to develop during week thirteen, and by week fourteen, they will be about the size of a lemon.

Week 15-16:

Your baby will begin to grow hair all over their body during week fifteen. By week sixteen, they will be about the size of an avocado.

Week 17-18:

Your baby’s fingerprints will start to form during week seventeen. By week eighteen, they will be about the size of a sweet potato.

Week 19-20:

Your baby’s movement will become more frequent and coordinated during week nineteen. By week twenty, they will be about the size of a banana.

Week 21-22:

Your baby’s taste buds will start to develop during week twenty-one. By week twenty-two, they will be about the size of a coconut.

Week 23-24:

Your baby’s lungs will start to develop during week twenty-three. By week twenty-four, they will be about the size of an ear of corn.

Week 25-26:

Your baby’s eyes will start to open during week twenty-five. By week twenty-six, they will be about the size of a butternut squash.

Third Trimester (Weeks 29-40)

The third trimester is the final stretch of pregnancy. Your baby is preparing for their big debut.

Week 27-28:

Your baby’s brain function will start to develop during week twenty-seven. By week twenty-eight, they will be about the size of an eggplant.

Week 29-30:

Your baby’s bones will start to harden during week twenty-nine. By week thirty, they will be about the size of a cucumber.

Week 31-32:

Your baby will start to gain weight rapidly during week thirty-one. By week thirty-two, they will be about the size of a jicama.

Week 33-34:

Your baby’s immune system will start to develop during week thirty-three. By week thirty-four, they will be about the size of a cantaloupe.

Week 35-36:

Your baby’s lungs will be fully developed by week thirty-five. By week thirty-six, they will be about the size of a honeydew melon.

Week 37-38:

Your baby is considered full-term at week thirty-seven. By week thirty-eight, they will be about the size of a leek.

Week 39-40:

Your baby is ready for their big debut! By week forty, they will be about the size of a watermelon.

Conclusion

Watching your baby grow and develop week by week is an incredible experience. From the first trimester until their first birthday, your baby will go through a lot of changes and milestones. Remember to take care of yourself during this time, too. Congratulations on your new addition to the family!

Frequently Asked Questions

What is the average weight of a newborn baby?

The average weight of a newborn baby is about 7.5 pounds.

When do babies start crawling?

Babies typically start crawling between six and ten months old.

When do babies start talking?

Babies typically start saying their first words around twelve months old.

Can babies see when they are born?

Yes, babies can see when they are born, but their vision is still developing.

What are some important milestones to look for in the first year of a baby’s life?

Some important milestones to look for in the first year of a baby’s life include smiling, crawling, standing, and saying their first words.