Charles B. Penrose, A Text-book of Diseases of Women
“ It should be remembered that every case of prolapse is greater when the woman is standing than when she is being examined upon her back. Sometimes the cervix will present at the vulva, where it may be felt when the woman is erect; but when she lies down and intra-abdominal pressure is removed, it retreats beyond inspection except through the speculum. In order to determine the full extent of prolapse, therefore, when the woman is examined on her back she should be directed to strain or bear down, when much more marked descent of the uterus and vaginal walls will become apparent. ”
