atural family planning method ?

Ans. is 'c' i.e., BBT Miscellaneous methods of contraceptions o These are (i) Abstinence, (ii) Coitus interruptus, (iii) Safe period (rhyth method), and (iv) Natural family planning methods. Abstinence o There is complete abstinence from sexual intercourse. It is not used and can hardly be considered as a method of contraception to be advocated to the masses. Coitus interruptus o It is the oldest method of voluntary feility control. The male withdraws before ejaculation, and thereby tries to prevent deposition of semen into vagina. Failure rate is very high 25%. Natural family planning methods o These are :- i) Basal body temperature (BBT) method : It is based on the principle that there is rise BBT at or just before ovulation. ii) Cervical mucus method (Billings method or ovulation method) : It is based on the observation that at the time of ovulation cervical mucus becomes watery clear resembling raw egg white, smooth, slippery and profuse. iii) Symptothermic method : This method combines temperature, cervical mucus and safe period (calender method) methods.