One of the following is not a method of contraception. Which one?

Oxytocin is a birth hormone, while vasopressin $(\mathrm{ADH})$ reabsorb water from renal tubules to conserve water in the body. Condom is the physical method of contraception, Lippes loop is intrauterine contraceptive device made of inert plastic and tubectomy is a sterilisation method of contraception in females. Related Theory $\rightarrow$ Saheli is an oral pill used as a contraceptive by females. Oral pills inhibits ovulation and implantation, as well as, after the quality of cervical mucus to prevent and retard entry of sperms. Progestogens or progestinoestrogen combination plays an important role in contraception.