Don't know about chicken but Maki Maki in Bethesda makes great shrimp tempura rolls. Their fish sushi is awesome too, especially the Spring Maki (mango and salmon). Though I guess you may not be eating that if you're pregnant, but make a note for the future!

Ok, maybe the HELP was dramatic, but I am pregnant and absolutely craving this. When I lived in NYC, my favorite sushi place had these chicken tempura rolls that were amazing. It was just chicken tempura in the roll instead of fish. I can't find any place around here that makes them.. anyone know of anywhere? I REALLY want one!!