Thanks so much everyone for your voices! I'll try to answer all your questions:
Yes, I can report my findings here, they'll be ready in May. The full explanation of the study in the link. I'm not aware of any need to pay - doesn't seem in the spirit of mumsnet to require money from users. AttitcusFinch, I can give you e full explaination if you email me: firstname.lastname@example.org. If you want to be entered into the prize, just email email@example.com with 'prize draw' in the subject box. The study doesn't recruit men, but thankyou for wanting to pass it on - you could pass it onto female friends if you wanted to help me out. That would be lovely!