Written by Sara Lindberg — Updated on June 8, 2021

One early sign of pregnancy, for some people, is sore breasts. If your breasts are swollen or tender to the touch and hurt when you bump them, this could be a sign of a positive embryo transfer. Kecia Gaither, MD, MPH, FACOG, an OB-GYN and director of perinatal services at NYC Health + Hospitals, says breast tenderness is due to the effect of pregnancy hormones. That said, sore breasts could also be a side effect of the hormone medication you’re taking during the 2-week wait. Injectable and oral progesterone are also known for causing breast tenderness.

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