I don't think that's what you're thinking. At this stage, the external genitalia still look very similar. Both girls and boys have "nubs" that look like little penises. Bits don't have visible testicals either, so there would be a full "turtle" to see. Did you happen to get any side shots? At this stage, the main difference is, anyone at which the "nub" sits when viewed from a side profile angle. But either way, congrats on your baby!!!