Clearblue are supplying a fertility monitor and 6 months worth of test sticks to go with it. Also a pregnancy tests, one per cycle. If you get pregnant while on the trial you will get £60 in high street vouchers
In return you have to collect an urine sample every day (they provide the sample containers) then send them away every 2 weeks probably. Also you keep a diary with an info about your cycle and monitor readings, they provide that too.
www.clearblue.info/uk/
thought it might interest some people.