Robuta

https://www.cochrane.org/evidence/CD007444_preparing-cervix-nitric-oxide-donors-surgical-abortion-first-three-months-pregnancy

https://www.cochrane.org/ru/evidence/CD007444_preparing-cervix-nitric-oxide-donors-surgical-abortion-first-three-months-pregnancy

https://www.cochrane.org/ms/evidence/CD007444_preparing-cervix-nitric-oxide-donors-surgical-abortion-first-three-months-pregnancy