FEMALE FLY SWITCH. “On the surface, sexual molecular interactions in Drosophila often appear to function cooperatively. For example, the switch to a reproductive state involves female processing of male-derived molecules that trigger ovulation. SFPs, but not sperm, are also necessary for conformational changes in female anatomy that allow sperm to enter storage.” (SFPs = male seminal fluid proteins).
http://onlinelibrary.wiley.com/doi/10.1111/jeb.12763/full