Meaning : Natural family planning in which ovulation is assumed to occur 14 days before the onset of a period (the fertile period would be assumed to extend from day 10 through day 18 of her cycle).
Synonyms : calendar method of birth control, rhythm, rhythm method, rhythm method of birth control
Calendar method ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Hindi. Calendar method ka matlab kya hota hai?