Actually, if you think about the numbers, they aren't taking much of a risk with the money back offer, or offering more than you would get 'naturally', are they? If statistically "about 84 per cent of couples in the general population will conceive within one year if they have unprotected, regular sex", and they're charging almost £500 for a glorified thermometer, they're on to a winner with their moneyback guarantee.
idealcamel You're 100% correct with your mathematical analysis.
I totally agree with lulumaman - it doesn't do anything except basic temps. Temps alone don't get you pregnant - unless it comes with some dried-sperm sachets? Just add water maybe?
Tbh, unless I've mis-read the gumpf and it actually cleanses my partner's sperm delivering only the very finest through my cervix, then injects me twice daily with progesterone and guarantees no miscarriage/birth defects then pfff not interested.
Big fat con.
Nothing on this earth can guarantee you a healthy baybeeee - not even IVF!