fbpixel
Certified Medical Magazine by WMA, ACSA, HON
How do ovulation predictor kits (OPKs) work?
0
Menu

How do ovulation predictor kits (OPKs) work?

Ovulation predictor kits (OPKs) or ovulation tests can help women identify when their fertile window is going to take place. However, there is no scientific evidence that using them can actually increase your chances of conceiving.

Urine-based OPKS work by testing a small sample of urine fora surge in LH levels, which normally occurs 1-2 days before ovulation. These tests are about 99 per cent accurate and are probably the best method for predicting ovulation.

Three possible results can appear (C = Control; T = Test):

Positive
LH surge. If the T band is equal to or darker than the C band, ovulation is about to take place within the next 24 to 48 hours.
Negative
No LH surge. If the color band appears on the C region, or the T band is lighter than the C band, there is no LH surge.
Invalid
No visible band. It appears when an insufficient volume of urine is added into the test kit.
By MD, FACOG, FACS, FACE (reproductive endocrinologist), BSc, MSc (embryologist) and BA, MA (fertility counselor).
Last Update: 02/10/2017
Comments
We use own cookies and third party cookies to offer you personalized ads and gather statistical data. If you continue the navigation we understand that you accept our cookies policy.