The Clearblue Fertility Monitor is suitable for you if your natural cycle normally lasts between 21 and 42 days. The majority of women will need 10 Test Sticks in each cycle. Women with irregular or long cycles may have to use 20 Test Sticks each cycle in order to detect their most fertile time.
Certain medical conditions and medications can adversely affect the performance of the Clearblue Fertility Monitor. If you have menopausal symptoms, polycystic ovarian syndrome, impaired liver or kidney function, or if you are pregnant or have recently been pregnant (even if not carried to full term), you may get misleading results.
You may also get misleading results if you are using antibiotics containing tetracyclines, hormonal treatments (e.g. hormonal contraception, hormone replacement therapy), fertility treatments containing human Chorionic Gonadotrophin (hCG) or Luteinising Hormone (LH), or any treatment that might affect your cycle.
If you’re taking clomiphene citrate, we advise you to consult your doctor for advice before using the Clearblue Fertility Monitor. Clomiphene citrate can raise oestrogen levels and this may result in High Fertility being declared early in the cycle and more High Fertility days being displayed, and in some cases the Monitor may not show Peak Fertility even when ovulation occurs.
We recommend that you always read the manufacturers instructions for any medication you are taking before conducting a test.
If you’ve recently been breastfeeding, using hormonal treatments (e.g. hormonal contraception, including emergency contraception, fertility treatments, hormone replacement therapy), or any other treatment that might affect your cycle, you should wait until you’ve had at least two natural menstrual cycles in a row (each lasting 21-42 days), before using the Clearblue Fertility Monitor.
Similarly, if you have recently been pregnant (even if not carried to full term) we advise you to wait until you’ve had at least two natural menstrual cycles in a row (each lasting 21-42 days) before using the Clearblue Fertility Monitor. This is to ensure that the results are not affected by any hCG you may still have in your body just after pregnancy.
Please speak to your doctor if you need further advice.
Please Note: There are no products available that can guarantee success in achieving pregnancy. The Clearblue Fertility Monitor is designed to help you become pregnant and is NOT intended to be used for contraception. Some medications are contra-indicated in pregnancy and we therefore recommend that you consult your doctor if you are taking any medication before you try to conceive. Couples with medically diagnosed fertility problems should consult their doctor before using this product.