4 doctors weighed in:
How accurate are ovulation tests usually?
4 doctors weighed in

Dr. Philip Chenette
Fertility Medicine
2 doctors agree
In brief: It varies
Ovulation prediction kits are one predictor of ovulation.
Others are menstrual cycle length, pain at ovulation, vaginal and cervical fluids. Ultrasound is a great way of detecting ovulation. If everything looks good, ovulation has probably occurred, but the only real test is whether you get pregnant.

In brief: It varies
Ovulation prediction kits are one predictor of ovulation.
Others are menstrual cycle length, pain at ovulation, vaginal and cervical fluids. Ultrasound is a great way of detecting ovulation. If everything looks good, ovulation has probably occurred, but the only real test is whether you get pregnant.
Dr. Philip Chenette
Dr. Philip Chenette
Thank
Dr. Gerard Honore
Fertility Medicine
In brief: OPK
They quite reliably detect urine lh, but much less good for predicting ovulation.
Since lh is nature's trigger for ovulation once a follicle is mature, we assume if lh is seen ovulation follows in the next few days. This is true in textbook cycles, but is wildly variable in real life. Ironically, they work best for women with clockwork cycles, and much less well for women who are less predictable.

In brief: OPK
They quite reliably detect urine lh, but much less good for predicting ovulation.
Since lh is nature's trigger for ovulation once a follicle is mature, we assume if lh is seen ovulation follows in the next few days. This is true in textbook cycles, but is wildly variable in real life. Ironically, they work best for women with clockwork cycles, and much less well for women who are less predictable.
Dr. Gerard Honore
Dr. Gerard Honore
Thank
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