Are They Still Girls?

So today I went to the doctor for my 20 week appointment. This particular doctor is a frequent ultrasounder. For some reason, he often says, "I'd just like to do a quick ultrasound to see how everything is going." So I'm thinking, "Yippee! I get to see my babies again!" Today I was even more excited at the thought that he would be able to confirm the previous diagnosis of 2 baby girls. And he did. They are still girls. No boy parts grew in the last two weeks! I was shocked all over again. How did we get so blessed?