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New Trimester, New Developments: Your Baby in the Thirteenth Week of Pregnancy

By the 13th week of pregnancy, your baby has entered the second trimester and continues to grow rapidly. The baby is approximately 7-8 cm and weighs about 23 grams. Internal organs, such as the liver and pancreas, begin to function and the vocal cords are developing. Unique fingerprints begin to form and bones continue to harden. The baby now has reflexes and can move his arms and legs. This is an exciting time where every day he brings new advances and developments.

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The images and descriptions of your baby's development from week 1 to week 42 have been generated by artificial intelligence. Although they provide a close representation, they are not 100% accurate. To obtain accurate and personalized information about your baby's development, we recommend that you have an ultrasound and consult your doctor.