Complex sentence: Uterine didelphys is a rare type of deformity, affecting 1 out of 1000 women, in the female reproductive organs in which some organs may be either split or duplicated.
Split into simpler sentences: Uterine didelphys is a rare type of deformity in the female reproductive organs, affecting 1 out of 1000 women. When it occurs, some organs may be either split or duplicated.