Does your 6 week old wake to feed at night?

0508bebe

My daughter is 6 weeks old and has been sleeping for up to 7.5 hours at night.  Do I need to wake her to feed at this point?  She was in the 90th % for weight at her 1 month appointment, but she was waking once at night to feed at that point.  I'm wondering if I should call the ped to ask, but thought I'd check here first.