N.P.
Please pardon my frankness, I am typically not like this but on this topic I am. If you are fertile, I see no reason as to why you should go on fertility and I would hope a doctor wouldn't just put you on it. If your finance is that much older, then perhaps you should only have one child. And the age of your finance has no bearing on his ability to conceive. Having "twins" or "multiples" isn't "IN" thing to do nor "neat". I am a mother of twins and it is so demanding not to mention the pregnancy can be a lot harder. Unless you have multiples, you really just don't understand. Countless times pass when I would like to really tell a person how I feel in saying "oh, I wish I had twins". Not to mention that by going on fertility, you could have 8 babies... would you truly and really be ready to accept ALL those children??
Yes, I love my twins and wouldn't change it for the world but I wish I had the luxury of spending time with one baby at a time.
Good luck.