Uterus Didelphys is known to be one of the rare Mulerrian Duct anomaly where in its development the uterus fails to unite so that the uterus separates into 2 parts: right and left which also have cervix in each part. Pregnancy with uterus didelphys may occur without infertility therapy and able to maintain its pregnancy to term. We report a rare case of Mullerian Duct Anomaly known as uterus Didelphys with spontaneous conception and aterm pregnancy on left horn.