Clearblue Advanced Digital Ovulation Test Pack of 30

Yes, certain factors can affect the accuracy. You may get misleading results if you are pregnant, have recently been pregnant, have reached menopause, have impaired liver or kidney function, or have polycystic ovarian syndrome (PCOS). Additionally, some fertility drugs containing luteinising hormone (LH) or human Chorionic Gonadotrophin, and antibiotics containing tetracyclines, can give misleading results. Always consult your doctor or pharmacist if you have concerns about medication or existing health conditions.