I was told this once by a non medical counsellor but I don't think it's so. Gave me hope at the time. But BFing IMO and experience may have contributed to my miracle pg at 42. I used an egg donor previously as my eggs and system were shot from years of endo and age factor. I was still BFing DD at 20 months when I fell pg naturally. So I reckon you're giving yourself a great chance by BFing now. I hope that may give you some comfort. Also I think a lot more people are being tested for low egg reserves these days, it wasn't so common a few years ago, and women are finding themselves in the position of being told they have 'low reserves' but I don't think this means you have a lesser chance of a successful pg, you just have more info about your possible fertility journey ahead over time - I can't back that up scientifically it's something I've observed personally.