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) | recurring at regular intervals |
recurring at regular intervals | |
(architecture) the repetitive use of a group of visual elements to establish a recognizable pattern | |
the arrangement of spoken words alternating stressed and unstressed elements | |
the basic rhythmic unit in a piece of music | |
an interval during which a recurring sequence of events occurs | |