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)
<noun.act> freq. cnt.: 2 freq. cnt.: 1 freq. cnt.: 1
<noun.act> freq. cnt.: 2 freq. cnt.: 1 freq. cnt.: 1
| calendar method |
|
| calendar method of birth control |
|
| rhythm |
|
| rhythm method |
|
| rhythm method of birth control |
|
semantic pointers
hypernym