I have been following some of the speakers at this London-based festival - Katherine Baldwin, Sarah Adefehiniti and Dr Mark Williamson - and this festival looks like a very exciting event that I'm hoping to get to. It covers 8 themes over 8 days, "championing positive global, local and personal change; learn how you can make a positive difference, to yourself and to others."
Its not an involuntary childlessness themed event but there are many workshops that could suit us so if you're free pop along. Here's the website