What Week Does The Baby Head Develops?

Baby Head DevelopmentSource: bing.com


Pregnancy is one of the most exciting and challenging times in a woman’s life. As a mom-to-be, you may be wondering about the development of your baby’s head. When does the baby’s head start to develop? Understanding the timeline of fetal development can help you prepare for your baby’s arrival and ensure their healthy growth.

Week 4-7

The development of the baby’s head begins during the fourth week of pregnancy when the neural tube is formed. This is the foundation of the brain, spinal cord, and nervous system. As the baby grows, the brain starts to develop into three primary parts: the forebrain, midbrain, and hindbrain. By the end of the seventh week, the brain has developed into recognizable structures, and the baby’s head is starting to take shape.

Week 8-12

During the eighth week, the baby’s face begins to form. The eyes, ears, and nose start to take shape, and the jaw and cheeks become more defined. By the end of the twelfth week, the baby’s head has grown significantly, and their facial features are more distinct. The skull is also starting to harden, and the brain continues to develop at a rapid pace.

Week 13-16

During the thirteenth week, the baby’s head is almost half the size of its body. The eyes have moved closer together, and the ears have shifted to the side of the head. By the sixteenth week, the baby’s head has become more proportional to its body, and the bones in the skull are starting to fuse together.

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Week 17-20

During the seventeenth week, the baby’s head circumference is measured during an ultrasound. This measurement helps the doctor assess the baby’s growth and development. By the twentieth week, the baby’s scalp hair is starting to grow, and the brain is rapidly developing. The baby’s head is now fully proportional to its body.

Week 21-24

During the twenty-first week, the baby’s face is fully formed, and the eyelids begin to open. By the twenty-fourth week, the baby’s head has become rounder, and the brain is more complex. The baby’s head is now covered in fine hair called lanugo, which helps regulate the body temperature.


In conclusion, the development of the baby’s head is a complex process that occurs over several weeks. From the formation of the neural tube to the fusion of the skull bones, the growth and development of the head are critical for the baby’s overall health and wellbeing. Understanding the timeline of fetal development can help you prepare for your baby’s arrival and ensure they receive the proper care throughout pregnancy.

Frequently Asked Questions

Here are some frequently asked questions about the development of the baby’s head:

Q: Can the size of the baby’s head indicate any medical issues?

A: In some cases, a larger or smaller head circumference can indicate medical issues such as brain development abnormalities or growth restrictions. However, it’s important to consult with your doctor to determine the cause and appropriate course of action.

Q: Can I do anything to support my baby’s head development?

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A: Maintaining a healthy and balanced diet, getting enough rest, and avoiding harmful substances such as alcohol and tobacco can support your baby’s overall growth and development, including their head development.

Q: When will my baby’s head start to grow hair?

A: Typically, the baby’s scalp hair will start to grow around the twentieth week of pregnancy.

Q: Can I do anything to stimulate my baby’s brain development?

A: Engaging in activities such as reading, singing, and talking to your baby can help stimulate their brain development, even before they are born.

Q: How often will my doctor measure my baby’s head circumference?

A: Your doctor will typically measure your baby’s head circumference during routine ultrasounds throughout your pregnancy to ensure their growth and development are on track.

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By administrator

I am a child development specialist with a strong passion for helping parents navigate the exciting and sometimes challenging journey of raising a child. Through my website, I aim to provide parents with practical advice and reliable information on topics such as infant sleep, feeding, cognitive and physical development, and much more. As a mother of two young children myself, I understand the joys and struggles of parenting and am committed to supporting other parents on their journey.

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