To use ovulation test strips, you must first collect your urine in a container. (doctor-info.website)
If an ovulation monitor is too expensive for you, you can test for ovulation manually my purchasing ovulation test strips online and following a manual process for testing. (natural-parenting-advice.com)
Both Arrington and Jennifer ordered a package of ovulation test strips as well as pregnancy test strips) for around 50 cents each! (natural-parenting-advice.com)