Gender guesses?

I had my first trimester screening today. She said it's too early to tell gender (which I'm aware of) but was wondering if anyone had any "theories" or guesses? I'm 12 weeks today based on cycle and early scan measurements, but baby was measuring 13w1d. Heart rate was 162. I have four boys already so I went into this pregnancy just assuming boy number 5, but my other boys desperately want a sister and I'm a little anxious for them to confirm if we are having another boy or not. Lol.