Re: OPK- How many times
10. Should I use first morning urine (FMU) with OPK's? No. LH is synthesized early in the day, and is not metabolized into your urine until later. So, as a rule, you are more likely to catch your surge later in the day. ("They" say you should test sometime around 2-4 p.m., but I've had fine luck at 10 p.m.-midnight.) Using FMU may not be a problem for you, but if you do not detect a surge during the cycle you use FMU, try testing later during the next cycle.
Note: the Clearblue Fertility Monitor is the exception. The FM Monitor does require FMU.
So maybe 2x a day? Afternoon and evening?
Courtney, wife to Matthew. Neurotic attached mom to Rosemary Elyse 12/11
, Lucy Kathryn 12/07
, Avery Jakob 7-05
and two tiny angels in heaven, Anthony & Grant