Ovulation Test FAQ

Ovulation Tests - or Ovulation Predictor Kits - allow you to predict, with great accuracy, your most fertile time of the month. Easy to use, OPKs can greatly increase your chances of becoming pregnant - if you use them correctly. Let our Ovulation Test FAQ help you enhance your predictive success!

(Editor's Note: Join our online community to discuss ovulation testing, or click here to purchase ovulation tests with free shipping.)

If used correctly, ovulation tests are excellent predictors of ovulation. However, in order to detect the LH surge with accuracy, directions must be followed exactly. The most common mistake made with OPKs is generalizing the methods of pregnancy testing to ovulation testing - which leads to errors in use and in the interpretation of results. To get the most out of ovulation testing, read our Ovulation Test FAQ.

Ovulation Test FAQ

Q: How do ovulation tests work?

ovulation test FAQ Ovulation tests detect luteinizing hormone (LH). Just prior to ovulation, women experience a brief surge in luteinizing hormone. Ovulation predictor kits help you pinpoint this surge and anticipate ovulation - your most fertile period in your cycle. Luteinizing hormone, in elevated amounts, is actually the hormone that causes you to ovulate (when the eggs bursts from the ovarian follicle), so that is why lh tests are so effective in anticipating your most fertile time.

Q: How do I interpret results? The same as pregnancy tests?

Ovulation tests function differently than hCG pregnancy tests. A positive result (indicating an LH Surge) is indicated by a test band that is of equal or greater intensity (equal or darker) than the control band. A negative result for the LH Surge is indicated when the test band is of lesser intensity (lighter) than the control band or cannot be seen. Click here to see diagrams of test results.

Q: What is the best time of day to take the ovulation test?

ovulation test FAQ Unlike pregnancy tests, morning (first morning urine) is not the best time to collect samples for ovulation tests, as LH is synthesized in your body early in the morning and will not appear in your urine until the afternoon. The ideal time to test is in the afternoon, around 2pm, though testing may safely take place from 10am to early evening.

Q: Should I take the test the same time every day?

ovulation test FAQ Yes, be sure to test at the same time each day. Also, reduce your liquid intake around 2 hours before testing as a diluted liquid sample can prevent or hinder LH detection.

Q: When should I beginning testing with the ovulation predictor kit?

ovulation test FAQ To determine when to start testing, you must first determine the length of your menstrual cycle. The length of the menstrual cycle is the number of days from the first day of menstrual bleeding to the day before bleeding begins on the next period. Determine the usual length of the menstrual cycle over the last few months. Then, refer to the Cycle Chart to determine on which day of the menstrual cycle to begin testing. Click Here determine when to begin testing?

Q: How long after my LH surge will ovulation take place?

ovulation test FAQ Generally, ovulation will take place 12-48 hours after the LH surge is first detected (using afternoon urine samples), though 36 hours is considered to be the average length of time following the LH surge.

Q: When I get a positive on an ovulation test, when is the best time to have intercourse?

ovulation test FAQ To increase the chance of conception, it is best to have intercourse the day of the LH surge as well as following three days after.

Q: Does the appearance of faint 'test band' indicate an LH surge?

ovulation test FAQ A faint line (or a faint positive test band) does not indicate a positive result for an LH surge. While the presence of a faint line on a pregnancy test may indicate a positive result, a faint line on an OPK is always negative.

Q: Does taking my basal body temperature tell me the same thing as an OPK?

ovulation test FAQ Basal Body Temperature only tells of your LH surge after it is over. That is why the BBT method cannot predict the LH surge. Ovulation tests will tell you - with pinpoint accuracy - when your chances for conception are greatest.

Q: Can OPKs be used as contraception devices?

ovulation test FAQ Ovulation tests are designed to help facilitate pregnancy. They are not recommended for contraception.

Q: Can clomid interfere with test results or cause false positives?

ovulation test FAQ Clomid may cause false positives if you test for ovulation too early in your cycle. Please consult with your doctor about how to use OPKs in conjunction with Clomid - or other fertility and prescription drugs.

Q: Does a light test line and a dark control line indicate a positive result?

ovulation test FAQ Ovulation tests are unlike pregnancy tests - especially when it comes to interpreting results. The results are only positive if the test line is equal to or darker than the control line.

Q: I had a positive result yesterday and today. Does that mean there is something wrong?

ovulation test FAQ Such results may indicate that your the tests detected the LH Surge on the way up and again on the way down.

Q: What if I experience a BBT thermal shift but the ovulation tests failed to detect my LH Surge?

ovulation test FAQ It is possible to miss the surge. If you have a test line that is fairly dark one day then very light the next, you may have missed the actual surge. If your thermal shift occurs, you probably ovulated. It may be a good idea to test twice a day when you feel that you are close to ovulating. Another possibility is that you didn't hold your urine long enough (resulting in a diluted sample).

See Also:
> How do OPKs work?
> How do I interpret ovulation test results?


I really do hope you are pregnant. We are on the same boat-- ONLY I miscarried last April 2009 after a month and a half. And never conceived again.. Tired and stresed out. Angry and frustrated- but we only have our faith to hold on to. Be strong=)

After talking with several doctors and specialists, this is the info I got and I'll share with all of you.

When you come off of birth control, your body will take a few months to adjust. You may have oddly timed LH surges during this time, and it may be better to wait a couple months before "trying," certainly before becoming concerned about not conceiving.

LH surges can happen anywhere from day 7 to 17 of a woman's cycle. When you first begin testing you should test all month for a couple of months. This will help you determine which 5 days to test after that.

Ovulation days should be calculated from the day you start your period, not guessed at based on how far you are from your next period, as the first day of your next period may vary. The first day you have "full flow" is day 1 or CD1.

If you are reading this pls pray for me. I want to be preg this month( By God's grace) I am so tired. hubby is 44 ( no kid at all. I am 27 though. but I am really tired of everythng. confused! tired! crying.

sorry to bother you with this

day 16 after my period . i got a postive on my test. before that my husband and l had unprotected sex 2 nights before and when i got the postive and two days after. i havent gotten my period yet . also dont have any pregnancy signs . i took two pregnancy test and it was negative . im 23 yrs old and im trying to have a second child plz help

Hi everyone. My husband and I just recently started trying to conceive. As such, I just recently got off the pill. On July 17 I started spotting and I got a full flow on the 19th. I went out a OPK and started testing on Day 10. I still have not received a positive and am getting very concerned because as all of you are probably doing, I've done tons of research and came across what is called anovulation. I know I'm probably just overreacting but htis has become extremely stressfull. I'm trying to tell myself that I'm just missing the LH SUrge because I don't want to think that I'm not ovulating. Any suggestions or advice to give me peace of mind.

Hello! Not a doctor but just wanted to give my feed back. When you are on the pill, your body regulates to a 28 day cycle. However when you are off the pill, your body naturally may be different. For myself, it took me 2 months before my own natural pattern started which was 30 day cycle. You may also ovulate at a different time than what the average is (ie. people say you should start testing at day 10 and on) you may ovulate before day 10. So if I were you, I would start the ovulation prediction test sooner as you may be ovulating sooner than the average recommended days. It takes a lot of work to get pregnant, the best advice I got is just to have sexy every 3 days and you shouldn't miss an ovulation day unless there is something else going on. Good luck!

I have been off of Yaz for 3 months, and my husband and I have been trying to get pregnant. After the 1st 2 periods, I was right at 28 days, and after this 3rd month, I was at 33 days for my period. I have taken a pregnancy test, and it did not come out positive. I keep trying to take ovulation tests 10-14 days before my supposed period (based on a 28 day cycle), and I have never gotten a positive result. Any ideas on what I can do to get something more accurate? Thanks!

last month i tested positive on day 14 dis month i now tested positive on day 15 if i make love d very day and next will i get pregnant

Please help! can someone clarify this for me.. I am very confused!! If I got a happy face today on my ovulating test but was with my boyfriend few days before... if I am pregnant (I am assuming.. talking about been positive ...) will I still get a happy face on my ovulation test or will results be affected by been pregnant?? all answers will be appreciated!! Thanks!

Me and my wife are trying for a baby of our own. We have three boys together from previous relationships. And her having one and me having two. Well 5 months ago we had a miscarriage and know we, are trying again with the help of OPK's and I am wondering what is the best time to take the test and what is Normal AF? And I would aloso like to share that we have been together for four years and the miscarriage is the first time we got close to her becoming pregnat at all over the four years of us being together. Is there an advice you can give? thank you jason

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Ovulation Calculator

Format: 7/30/2014
Increase your chances of getting pregnant! Our Ovulation Calculator will help you predict when you ovulate - your prime time for becoming pregnant.

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By TTC veteran and mother of two, Elizabeth Andrews.