Over three months ago, an agent requested meet send her a full manuscript, after I had sent her my first three chapters - and I have heard nothing since. Do I assume she is not interested and pursue other avenues, or send a polite email asking if she has had a chance to read it, or do I sit tight for another three months?
Frustrated from bucks,
Sit on your hands!!! Better still, go and write something else. If you've only sent your manuscript to her, than by all means submit to a few others. 3 months is nothing, honest. Celebrate the fact that your writing was way good enough to be asked for a full book - something that's a such a rarity, you know you're doing it right! My full submission has been with a publisher 10 months... I know they've got it, they acknowledged.
And good luck! (Not that luck's needed: the writing itself will sell it, but you know what I mean.)