Pre lay shed?

One of my normal girles ovulated last week! Last monday (18/jan/15) was the peak of her ovulation. Her swell has gone right down now, and I have been observing for sighns of her next shed (no pink belly yet). This is my first breeding season with any sighn of sucsess but is only my second time trying.My question is how long dose it take for a female to go in to her pre lay shed cycle after ovulation? Or can this vary from female to female ?

I find that they typically go into shed approx. two weeks after ovulation. I'm sure they can vary but I find it pretty consistent in my collection.