When you ovulate, you secrete the hormone LH in your urine. An ovulation test measures the concentration of LH, so when your ovulation test becomes positive, it means that the concentration of LH has increased significantly, and you can be sure that you are ovulating.

An ovulation test therefore helps to increase your chances of pregnancy, as it is only in the days leading up to ovulation and during ovulation itself that you can become pregnant. Read much more about it here: What is ovulation and when is the greatest chance to get pregnant? – Gravidtid

How safe is an ovulation test?

Ovulation tests for home use today have a high quality, and our ovulation tests at Gravidtid.dk are all more than 99% precise and CE approved, which means they are approved for sale in Europe. See our large, hand-picked selection of ovulation tests here: Ægløsningstests – Gravidtid

When should I start testing for ovulation?

It is recommended to start testing for ovulation 2-3 days before expected ovulation. Ovulation usually occurs 14 days before your period starts. This means that if your cycle is fixed at 28 days, you must start by testing for ovulation on day 11 or 12 (day 1 is the first day of your last period). If you do not know your cycle, you can start on day 10 or 11 after the first day of your last period. When the ovulation test is positive, you should have sex on the same day and the following two days to increase the chance of pregnancy. Also, have sex in the days leading up to ovulation, so you are sure that there are sperm in the uterus and fallopian tube when ovulation occurs. 

When you start testing, it is recommended that you test at the same time every day, if you only test once a day. LH is produced early in the morning, and therefore it is recommended that you do not measure ovulation early in the morning. Test preferably between 10:00 and 20:00 and avoid drinking in the last two hours until you test for ovulation. Too much fluid helps to reduce the concentration of LH, and this can help to give a false result:  How ovulation tests work – Gravidtid

Ovulation test and the temperature method - which works best? 

In short, a positive ovulation test will show that there are 24-36 hours until your ovulation starts. You therefore have a window of approximately 2 days, when the chance of pregnancy is greatest if you have intercourse. For comparison, the temperature method will show when you have ovulated, as the temperature rises right after ovulation Read more about the temperature method here: What is the temperature method BBT and how does it work? – Gravidtid

To optimize your chances of pregnancy, you can advantageously combine ovulation tests with the temperature method. You can see our selection of thermometers here: Termometre – Gravidtid

Negative ovulation test

If only one line appears in the control field (C) or if the line in the test field (T) is lighter than the line in the test field, then your ovulation test is negative. You should therefore test again the next day or later the same day if you think ovulation is close. 

Positive ovulation test

If your ovulation test shows two lines and the test line (T) is as strong or stronger than the control line (C) then your ovulation test is positive, and you will ovulate within the next 24-48 hours. Read more about when you are recommended to have sex with a positive ovulation test here: When should I have sex if I want to get pregnant? – Gravidtid

Invalid ovulation test 

If no lines appear at all on your ovulation test, or if the control line is almost indiscernible, your test is invalid, and you should take another ovulation test. Make sure to follow the instructions for use in the package. 

No positive ovulation tests?

If you don't ovulate for a single month, don't worry. It is normal for your body to skip a single ovulation. This can be due, for example, to a hormonal disorder, stress, grief, too much sport, weight loss or, for example, a venereal disease. If you do not ovulate for several months in a row, it is recommended that you contact your doctor. Read more about choosing the right ovulation test here: Guide to choosing ovulation tests – Gravidtid