@greatninja3
Elves are one of the few races known for low fertility. There could probably be a number of reasons for that, but if my *extensive study into such records* *cough* is accurate, it's usually one of several :
1) Very low conception rate. Could be like she mentioned, magic or other genetics , maybe due to their longevity making it harder.
2) Not a lot of interest in procreating. That being about the act itself, how they go about doing it or maybe just not liking their partner or raising children etc.
3) They don't tend to consider it important, or ya know, because they tend to live hundreds of years, they have a lot of interest in learning or doing other things, so it just kinda gets passed along until it might be to late, like our current world in some places.
I don't really have any statistics about how a population increase for elves would need to be to be considered as 'large' , but there's a novel, where an elf elder(eldress?, meh), who's amazed that another elf clan has had 3 new children born within the last year, out of a population of 1000.
So, she's amazed at a 0,3% population increase / birth rate (if you consider it per 1000, but i'm not sure if you do that, so it might be 0,6% if you go by couple, assuming they're all with someone)