Most of my girls eat up to ovulation, but after that they rarely keep eating.
I had one female I hadn't realized was gravid because she continued to eat up until 2 weeks before she dropped eggs. I thought I'd just missed her window for breeding and was kinda freakin out about how she looked (you know that raised spine look they get before dropping eggs), and then suddenly I came home and EGGS! My first couple years breeding were a collection of weird egg occurances, from eggs dropping 6 months after one lone copulation to that female continuing to eat for so long while gravid.
Aside from that one time though, most of my girls stop feeding around ovulation.
-Jen