I find it insulting that people think they can buy themselves twins by using IVF when they don't need it. If this was something that was allowed regularly, where would it end? In America when you have IVF they can test the embryos to see the sex. So what would happen to the embryos that are the unwanted sex? it could just spiral out of control.

I did have IVF and think that the resources should be used for those that genuinely need it. Those clinics are busy enough as it is without couples wanting designer babies joining the queues.