Ovulation is the release of a mature egg from the ovary. It signals the
beginning of your fertile period. The best or most fertile time to get pregnant
is the period before and during ovulation. LH (Luteinizing Hormone) is one of
the hormones produced by the pituitary gland. It is secreted at low levels
throughout your menstrual cycle. Once a developing egg follicle reaches a
certain size, LH secretion surges to high levels. This hormone surge is what
triggers ovulation about 24 to 48 hours later. Your LH surge is important
because it initiates the beginning of ovulation. Conception is most likely to
occur within thirty-six hours following the LH surge. The LH Ovulation Test
(ovulation predictor kit) is specifically designed to detect your LH surge :
the time when you are likely to ovulate.
What day should you start testing for ovulation?
Your most fertile days of the month are 1 to 2 days before and after your
ovaries release an egg. Sperm can live in the body for up to 5 days. Conception
can occur if you have intercourse 5 days before ovulation, and up to 1 day after
ovulation. Predicting ovulation is easier when you have a regular menstrual cycle.
With a 28-day cycle, you will likely ovulate on or around day 14, so you will want to
start testing around day 10 or 11. If you have a short cycle, you can assume that
ovulation will most likely occur within 4 days of your cycle’s midpoint. So, you should
start using an ovulation test kit 4 to 6 days prior to your cycle’s midpoint.
When is the best time of day to use an ovulation test kit?
There is no wrong or right time of day to test ovulation. Some women prefer to
test their urine in the morning, whereas others test it in the afternoon or evening.
Whatever time you choose, make sure to test at the same time each day.
Keep in mind that liquid can dilute the amount of Luteinizing Hormone in your
urine. If this happens, it can appear as if you are not ovulating when you are. Limit
your intake of fluids about 2 hours before testing. It also helps not to urinate 1 to 2
hours before testing.
How to do the test?
Ovulation tests are designed to detect levels of Luteinizing Hormone in your urine.
Urinate in a clean, dry cup and dip the test in the urine for few seconds. Results
are generally available in about 5 minutes. Ovulation tests have two lines: One is
the control line that signals the test is working properly while the other is the test
line. The test line will be lighter or darker than the control line, depending on level
of Luteinizing Hormone (LH) in your body. The test line appears lighter when you
have a low level of LH and it will appear darker when there is a higher level of LH
in your body.
How to read the results?
Your result is positive if two color lines are visible and the test line is equal
to or darker than the control line. A positive result indicates the presence
of a high amount of Luteinizing Hormone or LH surge. Make love following
the first positive test result to maximize your chances of becoming pregnant.
Your result is negative if only one line is visible or the test line is lighter than the
Your body produces Luteinizing Hormone every day during your cycle and you will
always have some amount present in the urine. That is why you will see a test line
on most of your tests. This is a healthy sign. Just remember, that the result is considered
positive if the test line is at the same intensity or darker than the control line. For
some women LH surge can last a couple of days, while for others it only lasts about
12 hours. Please keep in mind that every cycle is unique. Some women do not ovulate
every cycle and will not see an increase in LH levels during these non-ovulatory cycles.
Certain medical conditions and medications can adversely affect the performance of
the test: for example, if you are pregnant, have recently been pregnant, have reached
menopause or have polycystic ovarian syndrome (PCOS) you may get a misleading
result. This may also be true if you are taking fertility drugs containing Luteinizing
Hormone or Human Chorionic Gonadotrophin. Clomiphene citrate (Clomid®) does not
affect the tests, but may affect the length of your cycle and, therefore, when you
should be testing.