The ovulation test measures the concentration of the ovulation hormone LH (luteinizing hormone).
24-36 hours before ovulation, the LH hormone rises significantly, and if you test with an ovulation test, your ovulation test will turn positive when the hormone surges in relation to your ovulation.
You can identify a positive ovulation test when the test line is as dark or even darker than the control line.
See an example of a positive Femometer Ovulation Test Strip in the product images.
It is recommended to start testing for ovulation 2-3 days before the expected ovulation. Ovulation typically occurs 14 days before your menstruation begins. So, if your cycle is 28 days, you should start testing for ovulation on day 11 or 12 (day 1 being the first day of your last menstruation).
If you are not yet aware of the length of your cycle, it is recommended to start testing on day 10 or 11 of your cycle.
Pregnancy tests are designed to detect the pregnancy hormone Human Chorionic Gonadotropin (hCG). This hormone increases if a fertilized egg implants in the woman's uterus. Therefore, an elevated level of hCG in a woman's urine indicates pregnancy. Pregnancy tests have two antibody lines. One is the control line, which turns color when dipped in urine. If the control line appears, it confirms that the test is functioning properly. The other line is called the test line, and this line only turns color if your urine contains the amount of hCG that the pregnancy test is sensitive to.
hCG begins to rise when the fertilized egg has implanted itself 5-10 days after fertilization by a sperm cell and has started to divide. The level of the pregnancy hormone hCG then increases rapidly and doubles every three days during the first 12 weeks of pregnancy.
Clinical tests have shown that 99% of all pregnant women can test positive on a standard pregnancy test on the day of expected menstruation.
The reliability of early and standard pregnancy tests today is so high that it is extremely rare for a false positive result to occur. If your test is positive - meaning if a colored line appears on the test line of the pregnancy test within the specified time frame - then you are pregnant.
However, some individuals may still experience menstrual bleeding on or a few days after their expected period, leading them to think that the pregnancy test was a false positive. In most cases, this is due to a biochemical pregnancy loss, which occurs between weeks 3 and 5 of pregnancy. During this time, a pregnancy can only be detected through a pregnancy test or a blood test, and it would not be possible to visualize a fetus with a heartbeat on an ultrasound. Nevertheless, if a colored line appears within the specified time frame stated in the instructions, it indicates an elevated hCG level, which means that you are - or were - pregnant.
Please note that there are medications, such as Ovitrelle, that can increase hCG levels without being pregnant.