00853145-n
(2)
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metodo Ogino Knauss, metodo del calendario, metodo dell'astinenza periodica, metodo Ogino-Knauss, Ogino-Knauss |
rhythm method, rhythm, rhythm method of birth control, calendar method of birth control, calendar method |
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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) |