They are the same strips packaged in an ovulation predictor kit, OPK, except we sell them individually so you may customize the amount of strips you use to test your cycle.
Pregnancy is most likely to occur at the time of ovulation.
This is much more reliable than basal body temperature monitoring. Excellent instructions are included as to when during a menstrual cycle to start testing. This test cannot be used for contraception planning. Male urine may turn this test positive because of higher gonadotrophin levels in their urine. Do not use this test if you are receiving injections for ovulation induction from your physician.