How long does it take for the T line to be darker than the C line after the two lines on an ovulation test are the same depth?

Patient's question:

No

Doctor's answer:

The test line T of the ovulation test strip is lighter in color than the control line C, or only one control line C appears. This may indicate that ovulation has not yet occurred, or that ovulation has just happened. Without continuous testing, it cannot be determined.
Advice: For your situation, it is recommended that you start testing consistently two days after your period ends next month.