I have ds 3 and dd 19 months already and want to ttc for no3 when I'm 36 (next year) (Actually I'd like to before then but dh won't have it ) Just interested in how long took the slightly older amongst us to conceive as I know your fertility is supposed to take a nose dive when you get to 35. What is your experience? I got pregnant quite quickly with both of mine but was very scientific about it.