Hello, havnt had late period due to
letrozole but wanted to reply to your post as I am
in exactly same position as you, had Alfie at 38yrs and have been trying for sibling since, i''m 41, nearly 42 , tried clomid , gave me cysts after 4 cycles, had 4 unsuccessful ivfs(taking every bit of our savings nearly £20000) and now back to trying naturaly(alfie was natural)-cannot try letrozole as not licsensed in U.