gender guesses

Any guesses for my 12 week and 10 week ultrasounds.. I find out on the 28th when I'm 19 weeks but I should've found out weeks ago but materni21 failed :( so I am going crazy with curiosity..I have a boy and girl already ..I want a girl more where my fiancee wants another boy he already has 2 and believes he can only have boys so I want to prove him wrong but I'm not sure