Ovulation test kits

Posted by on Feb 5, 2015 in Conception, News/Articles | 0 comments

Ovulation test kits are another way to help pin point your fertile window. These come in the form of

  • Urine based test kits
  • Salivary based test kits


Urine based test kits

These kits work by measuring the level of luteinising hormone (LH) in urine. There is always a small amount of LH present in blood and urine, however the volume of LH increases 2 to 5-fold 1 to 2 days prior to ovulation to stimulate release of the egg. Measuring when this surge is occurring provides an indication that ovulation is about to occur. The 3 days immediately after commencement of the LH surge is the window during which you are most likely to conceive.

When using urine-based kits it is best to follow the directions outlined on the packed as these can vary slightly between brands. However, in general it’s best, although not essential, to test your urine at around the same time each day and ideally not first thing in the morning as this may miss the first day of your LH surge. Around 2 – 2:30pm appears to be ideal timing. Also avoid drinking too much liquid prior to the test as this may dilute urine. Read the results within 10 minutes of performing the test. Positive tests won’t disappear however a false positive may register after 10 minutes. Therefore once the results have been read, the test should be thrown out.

Urine based ovulation kits are around 99% accurate, making them one of the most reliable measures of ovulation, however they are not fool proof. It is possible for LH to surge without ovulation occurring. You may also experience false LH surges prior to the actual surge. However their strong reliability still makes them one of the best methods for predicting ovulation at home.


Salivary-based test kits

Using a tiny microscope, these kits enable you to visualise the changes in saliva patterns, stimulated by a change in hormone levels. Estrogen increases the salt content of your saliva. When this salt dries, if forms a fern-like pattern which can be seen through the microscope.   This fern-like pattern indicates the presence of a high level of estrogen, which is most likely to occur in the few days leading up to ovulation. So when you see this pattern, the 3 – 4 days following this will be your most fertile.

Saliva based test kits aren’t quite as accurate as urine based test kits. This is due to the fact that the fern-like patter may be present at other times during your cycle depending on your hormone levels. For some people, it may also be hard to accurately identify the fern-like pattern through the microscope. However, this type of kit can be a more popular option due to the convenience of testing as well as the ability to use the same test over and over for around 2 years.


Fertility medications can impact the accuracy of both kits, so best to speak with your specialist if you are taking any prescribed hormonal medication.


You can also track your fertile days by charting your temperature each morning.  Find out more details here.


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