Dawao Ya Anya

Dawao ya anya garbh nirodhako ki tulna mai prakritik garbh nirodhak adhik prabhavi hai. China mai huye ek shodh ki mane to prakritik roop se apnaye gaye garbh nirodhak ke prabhavi hone ki sambhavna 97 se 100 pratishat tak hoti hai. Yani yeh puri tarah se surakshit tarika hai.