Isn't the post ovulation shed the same thing as the pre lay shed? I'm kinda confused by your post... maybe it's just me. From ovulation to lay is 50 days give or take. So any shed post ovulation would be a pre lay shed, generally 30 days and you have eggs. Anything pre ovulation would be a pre ovulation shed, which usually happens about 2-3 weeks prior to ovulation. Correct?