calendar method of birth control(n = noun.act) calendar method, rhythm, rhythm method, rhythm method of birth control - 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);
is a kind of natural family planning

active birth, alternative birth, appointment calendar, arms control, ascii control character, basal body temperature method, basal body temperature method of family planning, bell system of control, beyond control, birth, birth canal, birth certificate, birth control, birth control device, birth control pill, birth defect, birth pangs, birth prevention, birth rate, birth trauma, bradley method, bradley method of childbirth, breech birth, calendar, calendar day, calendar method, calendar month, calendar week, calendar year, cascade method, center for disease control and prevention, church calendar, compound control, contraceptive method, control, control account, control board, control center, control character, control circuit, control condition, control experiment, control freak, control function, control grid, control key, control operation, control panel, control rod, control room, control stick, control stock, control surface, control system, control theory, control tower, crowd control, cruise control, damage control, ecclesiastical calendar, eclectic method, experimental method, farmer's calendar, fire control, fire control radar, fire control system, flight control, flood control, gaining control, give birth, give birth to, given birth, giving birth, gram method, gram's method, greek calendar, gregorian calendar, gregorian calendar month, ground control, gun control, hebrew calendar, hindoo calendar, hindu calendar, hindu calendar month, internal control, inventory control, islamic calendar, islamic calendar month, jewish calendar, jewish calendar month, job control, job control language, joint control, julian calendar, lamaze method, lamaze method of childbirth, leboyer method, leboyer method of childbirth, line of control, live birth, lunar calendar, lunisolar calendar, maieutic method, management control, method, method acting, method of accounting, method of choice, method of fluxions, method of least squares, military control, mohammedan calendar, montessori method, moslem calendar, motor control, muhammadan calendar, muslim calendar, new birth, new style calendar, old style calendar, out of control, ovulation method, ovulation method of family planning, perpetual calendar, place of birth, population control, posthumous birth, powder method, price control, quality control, radio control, read method, read method of childbirth, relaxation method, remote control, revolutionary calendar, revolutionary calendar month, rhythm method, rhythm method of birth control, riot control, riot control operation, roman calendar, scientific method, sentence method, social control, socratic method, solar calendar, statistical method, straight-line method, straight-line method of depreciation, take control, teaching method, three-torque system of control, traffic control, transmission control protocol, transmission control protocol/internet protocol, under control, united nations office for drug control and crime p, vaginal birth, virgin birth, whole-word method, withdrawal method, word method