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Illustration of baby development at week 1 of pregnancy

The Start of a New Life: Your Baby in the First Week of Pregnancy

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In the first week of pregnancy, the miracle of life begins with the fertilization of the egg by the sperm, forming a tiny ball of cells known as a zygote. This zygote then begins its journey to the uterus, where it will implant and continue to develop. Although it is not yet visible to the naked eye, each cell is working tirelessly to form what will soon be your baby. This stage is crucial and marks the beginning of an incredible journey.

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The images and descriptions of the baby's development from week 1 to week 42 have been generated using artificial intelligence. Although they offer a close representation, they are not 100% accurate. For exact, personalized information about your baby's development, we recommend getting an ultrasound and consulting your doctor.

This content is for educational purposes and does not replace medical advice. Sizes and weights are reference averages and vary in every pregnancy. If you notice any warning sign, seek medical care immediately.