There were no significant differences between morning and evening melatonin results. Urinary luteinizing hormone results are shown in Figure 2. In the smaller subgroups which provided blood LH ...

But you may want to be more strategic and pinpoint your most fertile days if: There are two kinds of ovulation prediction kits: These test your urine for an increase in luteinizing hormone (LH).

Medically reviewed by Cordelia Nwankwo, MD Ovulation test kits, used to track when getting pregnant is more likely, may not be as reliable if you have polycystic ovary syndrome (PCOS). This is because ...