Spermicidal cream which is used in contraceptives?
Spermicidal agents provide a physical barrier to sperm penetration and a chemical spermicidal action. Active ingredient is nonoxynol-9 or octoxynol-9. Spermicides must be deposited high in the vagina in contact with the cervix sholy before intercourse. Duration of maximal effectiveness is usually no more than 1 hour. Therefore, they must be reinseed before repeat intercourse.
Gossypol
Nonoxynol-9
Cent chroman
Clomiphene
FMGE 2019