The uterus is not an immunologically privileged site. The maternal genome codes more for the somatic differentiation and the paternal genome codes more for trophoblastic differentiation.
Molar overgrowth occurs with excess paternal chromosomal content.
If small uterus, can do under local anesthesia. If large uterus, have anesthesia present and consider central venous access. If thecalutein cysts present, be very careful with ovaries, similar to hyperstimulated ovary syndrome with ascites. Rupture, hemorrhage or infection is easy. Size returns to normal within twelve weeks usually.