Prognosis following in vitro fertilization-embryo transfer (IVF-ET) in patients with elevated day 2 or 3 serum follicle stimulating hormone (FSH) is better in younger vs older patients: Article

Here is a summary of a paper by Check et. al. puvblished in Clin Exp Obstet Gynecol 2002; 29:42-4.
Please note that the article is old (2000) and therefore pregnancy rates are expected to be higher in 2012. Overall the result is meaningful though. also note that the pregnancy rates in the study are per transfer and therefore do not include cancelled transfers. Also live birth  rates are expected to be lower.

IVF success/transfer	FSH <12	FSH >12
Age  <38	32%	28.6%
Age >38	30.3%	5.5%