How To Test


How Does An Ovulation Test Work?

Ovulation is the release of an egg from the ovary, when the egg reaches the fallopian tube it is ready to be fertilized. In order for pregnancy to occur the egg must be fertilized by sperm within 24 hours after its release. Immediately prior to ovulation the body produces a surge of Luteinizing hormone (LH) – this usually takes place in the middle of the menstrual cycle. LH triggers the release of the egg from the ovary. Clear & Simple Ovulation tests detect the LH surge in urine, signalling that ovulation is likely to occur in the next 24-48 hours. During this period of ovulation you are at your peak fertility. It is during this most fertile time that pregnancy is most likely to occur if you have sex.

What Are Ovulation Tests Used For?

Most people use ovulation tests to track ovulation so that they know when the best time is to try for a baby. Some people use ovulation testing as a natural form of contraception so that they know when to avoid sex. It is not a totally reliable form of contraception but is recommended by some religions opposed to contraception and is sometimes called the rhythm method.

When To Test

To determine when to start testing you must first determine the length of your Menstrual Cycle. This is the length in number of days from the first day of your period to the last day before your next period starts. Once determined over a number of months refer to the Cycle Chart to the right on which day to start testing.

If you are unsure about your cycle length you may begin the test 11 days after the first day of your period as the average cycle length is 28 days. Perform 1 test each day over a 5 day period or until the LH surge has been detected.

Home Pregnancy And Ovulation Tests

A urine specimen must be collected in a clean and dry container. Do not take a urine specimen first thing in the morning. The best time to collect your urine is between 10am-8pm as LH is synthesized in your body in the morning and will not show in your urine until later in the day. Reduce your liquid intake about 2 hours before collecting your urine as diluted urine can prevent the test detecting the LH surge. Testing should be performed immediately after the specimens have been collected. Do not leave the specimen at room temperature for a prolonged period of time.

How To Test

  • 1. Remove the test strip from the sealed pouch
  • 2. Immerse the test strip in the urine sample for at least 10 seconds with the arrow pointing down.
  • 3. Do not immerse the strip above the maximum line
  • 4. Remove the test strip from the urine and lay flat on a non-absorbent flat surface.
  • 5. Wait for the coloured lines to appear, read result within 10 minutes. Do not read result after 10 minutes.

Reading The Results

Positive – If 2 colour bands appear and the test line is equal to or darker than the control line ovulation will occur in the next 24 – 48 hours.

Negative – If only one band appears or if one line is much lighter than the other then there is no LH surge yet ovulation will not occur in the next 48 hours.

Invalid – If no lines appear the result is invalid. This is almost always due to the test not being wet enough but may also be due to a faulty test. Repeat the test and be sure to dip the correct end of the test in the urine sample for at least 10 seconds.

Cycle Chart

  • Your Cycle Length (Day):

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  • Start Test On (Day):

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