Ovulation Testing: How Ovulation Predictor Kits Work






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When you are trying to get pregnant, there are a number of tools that you can use to determine your ovulation schedule. By knowing the specific days that you ovulate, you will be able to time intercourse with your fertile days and increase your chances of getting pregnant. Because this fertile window is only a couple of days, it is extremely important that sperm is present during this time so that your egg will become fertilized.

1. Why use OPKs?

One of the best things about Ovulation Predictor Kits (OPKs) is that they are extremely easy to use. They work mostly like a pregnancy test and look for certain hormones in a woman’s urine. They are also very reliable when used correctly.


It is also very easy to find OPKs and they are available at almost any supermarket and drug store that you will visit. There are also ones that can be taken at your doctor’s office and you can order them online as well. There is no prescription required, so obtaining them is simple and easy.

2. How do OPKs work?

OPKs detect the hormone, luteinizing hormone or LH in your urine, which first appears about 24 to 36 hours before you begin ovulating. This is a strong indicator that you are ready to ovulate and you will know when the best time to have intercourse is. You should keep in mind that these tests will not tell you whether you have ovulated or not.


LH has been shown to surge during this time, whether your egg is released or not. Therefore, you need to follow the instructions on your ovulation prediction kit carefully and if you find that you are still not able to get pregnant after a few careful months of planning your intercourse around ovulation, you should see your doctor for guidance.

3. How do I use an OPK?

Using one of the kits is fairly simple to do. Since they work similar to a pregnancy test, you will simply hold the strip in a stream of urine as indicated in the instructions that are provided with your kit.

It is also possible to use urine that has been placed in a cup, but you should also look into the best way to complete this task as well. The next thing that you need to do is to test daily. Since your hormone levels can change quickly, you need to be very dedicated to this so that you are receiving the most accurate reading.


You should test at the same time each day and avoid drinking water before you test. The most important thing about an OPK is that you need to have intercourse within 36 hours of testing positive on your OPK. This is the best opportunity to get pregnant.

4. Who should not use an OPK?

There are some women that an OPK will not work accurately for. For example, women with PCOS or who have irregular periods may find that the readings are not accurate. It may also be more difficult for women with extra-long cycles to have enough test strips each month. In these instances, you may find that you need to use more than one kit each month before you receive a positive result.


If you discover any issues while you are using ovulation predictor kits, you should talk them over with your doctor. There are some conditions that must be addressed medically before you are able to get pregnant and your doctor will be able to determine if you have any of these conditions.

5. Conclusion

Using an ovulation predictor kit is an extremely effective way to learn when you are ovulating and when the best time to have intercourse is. Be sure that you follow the instructions so that your reading will be more accurate. These kits come in a variety of styles that are all very accurate. You should choose a method that you are most comfortable with and can easily understand how you should take the test.


If you are trying to get pregnant and OPK can be a lifesaver when it comes time to scheduling intercourse. It can help you determine the best time to have intercourse and allow you to know when you are most fertile. If you would like to know more information about ovulation predictor kits, your doctor will be able to provide that to you and may even have a few samples for you to try.

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Ms. Wisniewski has over 15 years experience as a labor and delivery nurse, having also worked previously as a nurse midwife in the Philippines and India. She enjoys empowering women and providing family centered care to women from all cultural and educational backgrounds.