Ovulation: Pros and Cons of Ovulation Predictor Kits (OPKs)

Learn all about OPKs before relying on them.
Trying to Conceive: Your Ovulation Calendar
Trying to Conceive: Your Ovulation Calendar
Clearblue Easy Digital Ovulation Test

Many couples rely on ovulation predictor kits, or OPKs, to identify when the woman is most fertile. OPKs can detect a surge in the production of luteinizing hormone (LH), which occurs roughly 36 hours before ovulation. By timing intercourse shortly after the LH surge, you can increase your odds of bringing sperm and egg together at the time when conception is most likely to occur.

Sounds easy, right? In a perfect world, OPKs would infallibly detect ovulation, and ovulation would inevitably lead to pregnancy. The reality is more complicated, so be sure to consider the pros and cons of OPKs before trusting your fertility exclusively to this method.

Pros

1. OPKs are more precise than other methods of monitoring ovulation. Used correctly, the major-brand OPKs are more than 97 percent effective in detecting an LH surge, which is used as a marker for ovulation.

2. OPKs are convenient. OPKs are used only in the middle of your cycle, during the time when you would be most likely to ovulate (note that it helps to have a sense of your typical cycle length, so start keeping track now if you haven't already). Other methods, such as charting your basal body temperature (BBT), require a daily commitment.

3. OPKs are widely available. You can get them over the counter at drugstores, pharmacies, and even major supermarkets and convenience stores, without a prescription.

4. OPKs are easy to use. Ovulation kits are similar to home pregnancy tests -- you simply urinate on the test stick, activating a chemical that can detect your LH surge. Most OPKs contain between five and nine test sticks.

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