That's what we've discussed in the thread posted earlier this past month. Sometimes it works, sometimes it doesn't...it's simply a contact call made by all deer and not an estrous bleat......

You can mimic the call with any adjustable call that makes doe bleats. It's simply a bleat that rises and falls in pitch...try it, it might save you some money on the call itself if you have a call that you can mimic it on.