Odette - unexplained infertility is still infertility. we're not talking about people who have been trying for 12 months, 2 years, whatever, who go to the FS due to not being able to conceive on there own - we're talking about people who decide "hell, it's time for us to TTC, but we don't want to try on our own, we want to go through IVF cos we want twins" - there is a huge difference there!

you also wouldn't decide when you want to go back for your next kidlet that you're going to TTC, but you want twins again, so you're going to be referred to an FS straight away. there is a very different mentality for those that have tried themselves, and need referring for extra help, and those that just want to have their family a certain way...