I used Glow for 1 month we tried on the 4 days that Glow said I would be at my highest ovulation days. I kept daily logs also to keep everything perfect and updated. I tested on a cheap tesco brand 4 days before my period date and got the faintest line possible. I started to panic and think is this test faulty?! So the next day 3 days bore my period date I took a clear blue and waaaaalaaaaa a strong positive! I now know I am pregnant and am looking to book a appointment at the doctors this week and will keep Glow users updated during my pregnancy.