it depends on your cycle length, mine have been ranging from 25 to 32 days, so i start on CD13/14 until I get a +ve, then the next day to make sure its going back to -ve
Depends how long your cycle is......My cycles are 25 - 26 days and I start CD9 and usually get a +ve on CD10. I use about 2 or 3 OPK's per cycle as I know I OV then.
First time using them you may use more than 5 tests
TTC for 4 1/2 years IVF #1 - April 2012 short BFP, no frosties IVF #2 - August 2012, BFP!! 3 frosties!
Depends on your cycle, like the others have said. For a starting point try taking your first test about 15/16 days before your period is due. You might need to use a few more than normal in the first cycle to get it all worked out.
i am irregular. i start first day its not heavy flow anymore. lots of OPK's for me. i buy the cheapest ones, they work fine. they also show up as positive when you are pregnant. if you want an explanation on that last bit, just PM me.
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When to start OPK?
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