Certain medical conditions and medications can adversely affect the performance of the Clearblue Fertility Monitor. Women who have menopausal symptoms, polycystic ovarian syndrome, impaired liver or kidney function, are pregnant or have recently been pregnant, may get misleading results.

Please note that there are no products available that can guarantee success in achieving pregnancy. Clearblue Fertility Monitor has been designed to assist in conception. 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 conceive. Couples with medically diagnosed fertility problems should consult their doctor before using this product.