It can be performed using a catheter with a balloon that is inserted under direct vision through the cervix. The balloon is inflated with 30 ml of sterile water, allowing medication to be injected through the catheter into the extra-amniotic space.
^Gómez Ponce de León R, Wing DA (April 2009). "Misoprostol for termination of pregnancy with intrauterine fetal demise in the second and third trimester of pregnancy - a systematic review". Contraception79 (4): 259–71. doi:10.1016/j.contraception.2008.10.009. PMID19272495.