These inexpensive, no frills test strips will tell you when you're ovulating.

Ovulation test strips are 99.9% accurate at detecting your “LH Surge” the sudden, brief increase in luteinizing hormone present in your urine just before you ovulate. Because fertilization of your egg can only occur within 24 hours after ovulation, predicting ovulation is the key to pinpointing your window of fertility and successfully conceiving.