When luteinising hormone (LH) levels are at their peak, this is an indication of peak fertility – it is in this window that you have the best chance of conceiving.

This window is surprisingly short. Ovulation involves the release of an egg from the ovaries – it then passes to the fallopian tube where it awaits fertilisation. It must be fertilised by sperm within 24 hours after its release for pregnancy to occur.

Immediately before the egg is released, large quantities of luteinising hormone (LH) are released into the body – this actually triggers the release of the egg. It is sometimes known as an ‘LH surge’, and as heightened LH levels can be detected in urine, it can be a powerful indicator of the best time to try and conceive.

This surge normally takes place in the middle of the menstrual cycle.

Please note that not all menstrual cycles result in ovulation – nor does the LH surge occur in every instance.

Testing procedure

1. Once you have determined the correct day to start testing, bring the pouch to room temperature and open it. Remove the midstream test from the sealed pouch – you need to use it within an hour, so be sure you’re able to urinate before opening it.
2. Remove the cap and place it over the thumb grip.
3. Hold the test by the capped thumb grip with the exposed tip pointing in a downwards direction and urinate directly onto it for at least 1-15 seconds. Make sure it is thoroughly soaked.
4. Immediately replace the cap over the absorbent tip and lay it on a flat surface with the result window facing upwards.
5. Immediately start a timer and read the results at 5 minutes. As the test starts to work, you may observe a light follow moving across the test and control window. This is normal. If no result appears, wait one more minute. Do not read the result after 10 minutes.

Inside the box you will find:

• 1 x set of instructions
• 1 x ‘When to start testing’ chart
• 5 x test devices