Baby Development Milestones: Brain, Bone & Neck Growth Guide

Baby development spans from conception to birth and beyond, encompassing critical milestones in brain, bone, and skull growth. Average infant weight gain and growth spurts vary by month.

Baby (3-6 months) lying on white sheets, close-up

Stages of Baby Weight in the Uterus

Throughout your pregnancy, you probably only need to look at your belly in the mirror to recognize that your baby is steadily gaining weight. During each phase of fetal development, your baby will grow significantly in terms of developing organs, body systems and senses.

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