Baby Genital Development In Womb: What to Expect

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Pregnancy is an exciting time for any expectant mother. With each passing day, your baby is growing and developing, and it’s fascinating to learn about all the changes happening inside your womb. One area of development that may generate curiosity for many mothers is baby genital development in the womb. In this blog post, we will explore what to expect during this process.

Week 4-6: Gender Determination

During the fourth to sixth week of pregnancy, the sex of your baby is determined. Although both sexes have the same basic genital structure, it is at this stage that the fetus begins to develop either testes or ovaries. The presence of testes leads to the development of a penis, while the absence of testes results in the growth of the clitoris.

Week 7-8: Formation of External Genitalia

Around the seventh and eighth week, the external genitalia of your baby begin to take shape, and it becomes possible to determine the sex of the fetus through an ultrasound. If you’re expecting a boy, you’ll see the formation of the scrotum and the growth of the penis. For girls, you’ll see the development of the labia.

Week 10-12: Completion of Genital Development

By week 10-12, baby genital development in the womb is almost complete. For boys, the testes have descended into the scrotum, and the penis has grown to its final size. For girls, the uterus and ovaries have fully developed, and the labia are larger and more defined.

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Factors That Affect Baby Genital Development in the Womb

Several factors can affect the development of a baby’s genitals. These include genetics, exposure to certain hormones, and environmental factors. For example, the use of certain medications during pregnancy or exposure to toxins can affect the development of the fetus’s genitalia.


Baby genital development in the womb is a fascinating process that occurs over several weeks. Understanding what to expect during this time can help expectant mothers feel more prepared for the journey ahead. Remember, every baby develops at their own pace, so it’s essential to trust your doctor and stay calm throughout the process.

Frequently Asked Questions

Q: Can the sex of my baby change during pregnancy?

A: It is highly unlikely for the sex of your baby to change once it has been determined. However, there have been rare cases where a baby is born with ambiguous genitalia, making it difficult to identify their sex.

Q: Is there anything I can do to ensure the proper genital development of my baby?

A: The best thing you can do is to maintain a healthy pregnancy by eating a balanced diet, staying hydrated, and avoiding harmful substances such as alcohol and tobacco.

Q: Will my baby’s genitals look different from other babies?

A: Every baby’s genitals are unique and will look different from others. This is a normal part of human diversity.

Q: When is the best time to determine my baby’s sex through an ultrasound?

A: The best time to determine your baby’s sex through an ultrasound is during the second trimester, around week 18-20.

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Q: Do I need to worry if my baby’s genital development is taking longer than expected?

A: It’s important not to worry if your baby’s genital development is taking longer than expected. Every baby develops at their own pace, and it’s essential to trust your doctor and stay calm.

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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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