What to Expect During Your First Trimester

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• The first trimester lasts from week 1 to week 13.

• Many women report feeling fatigue, moody and/or hormonal, nauseous, heartburn, constipation, food cravings, food aversions, and swollen or tender breasts.

• Your baby will start as a single fertilized cell (a zygote), to the embryo that implants itself in your uterine wall, to a peach-sized bundle of growing limbs and body systems. Organs take shape, and baby starts to move.