I have heard both be said. I have heard probing can be unreliable and I have heard popping can be unreliable. I thought it would be a good deal harder to pop her than it was. Truth be told it was relatively easy. I will take her and have her probed, but as far as I can tell she was female, I put in a bit of pressure and all that popped out was a squishy hole lol. No hemipenes to speak of. I'll still look into probing though, there's a place that does it, but its about 45 mins away.