Ovulation tests may help a woman attempting to get pregnant to determine their most fertile period. Ovulation tests are available in different forms. The most common tests are slightly similar to pregnancy tests. However, they are meant to work by detecting the presence of LH, a Luteinizing Hormone which is always present in the urine and tends to increase 24-48 hours before ovulation. The LH surge triggers the egg's release from the ovaries, a process known as ovulation.
Some women find Ovulation pregnancy test useful when doing natural family planning, while others utilize them to improve their chances of becoming pregnant during the most fertile period of the month. Luteinizing Hormone starts to be released in a woman's body right before ovulation, and its presence can usually detect in the urine. Therefore, with either test strips or mid-stream testing inserted into the collected urine, a woman can get a negative or positive result on the ovulation test, suggesting that she is about to ovulate.
Other early pregnancy test strips include fertility monitors, also used to detect Luteinizing Hormone through urine test strips. In addition, people do evaluate other hormones, such as estrogen. Women test daily with such a monitor and know they are approaching ovulation when they get "high" readings in several days.