proliferative is a uterine lining stage, so since we're talking about ovarian stages, that can be thrown out. there are really only luteal, follicular and ovulation stages in the ovaries. i'd go with luteal. during the secretory stage of the uterus, the oocyte is Leaving the follicle, so think Luteal=Leaving. 🙂 hope that helps.
Secretory phase is a synonym for Luteal phase, that's pretty much it. The main hormone controlling this stage is progesterone, which is significantly higher during the luteal phase than other phases of the cycle.