This is the image that the tech used to determine she's a "she"! To interpret for those not familiar with reading ultrasounds, you are looking at her little butt and the bottom of her thighs (she's going to kill me for this when she's a teenager, huh?). If you look at the space where her two little legs meet, you will notice something (the male organ) is missing. You can even see the little slit right in the middle. She's definitely a she!
Here's a good profile shot. It was amazing how you could see the profile along with the spine and even the little heart pumping (it was like a flashing light in her chest).