I met Zita West and heard her speak a few years ago - at the fertility show in London. She talked a lot of sense about things like not temping. Also things like having sex alternate days, and when the guy wants to have sex his swimmers are probably at their strongest etc.
I also visited the Marilyn Gelnville clinic and read her book. We did buy some vits and used them but now we just buy some vits (zinc I think) for dh from the chemist and I just take folic acid.
I am not sure how much vits make a difference. I think a good diet can help but at the end of the day there might be medical things that would help. I would agree with whoever said that there are dangers in that there is the chance to spend lots of money on stuff so do get as much info and help for free from the Internet and library (if you are lucky enough to have one - e.g. borrow a book!).
My friend has PCOS and is slim and healthy and eats a very good diet. She has just had her second child but did have a few miscarriages in between. I'm not sure it is just about being slim, exactly, it might also be about a healthy diet. I used to think there was healthy and there was unhealthy but it might be that some foods are better for some people etc, so might be worth looking into it.
Have you asked for a medical opinion about things to do/avoid etc? have you had a Google around and found out info?
I found this page and it looks interesting but I have no idea if it is all correct.
natural-fertility-info.com/pcos-fertility-diet
Also www.bellaonline.com/articles/art36449.asp
says "Women with PCOS are known to have higher levels of certain auto-immune diseases too such as thyroid auto-immune disease which can negatively affect fertility and increase miscarriage risks. Thoroughly checking this - and other common coexisting conditions associated with PCOS - can greatly speed conception. Auto-immune factors could one of the bigger road-blocks on your journey to conception that need to be removed, even though your diagnosis is PCOS."
I have NO IDEA if this is corrcect but I know that my thyroid is playing up or rather playing down and I am now on tablets to get my TSH (hormone) lower. It runs in the family, my sis and mum also take tablets but when I was trying to conceieve when i was younger it was not checked (as far as I know). I pushed for checks and this was brought up so it is good to check out anything things that are a problem or MIGHT be and you MIGHT find that your GP (if you are in the UK) can get this checked (blood test) for free for you.
Please take all my 'Advice' with a big pinch of salt as we are all different and I don't have PCOS but I do have two lovely friends with PCOS and they have both had babies, two each. I think most of the conceptions were natural although I know one of them tried Clomed (fertility drug) after one of her children was born and she was trying for number 2.
So please take heart and I hope it will all work out.
Good luck with conceiving, all the very best.