When does a baby have a gender?

pink potatoes asked:


I’m four months pregnant and CAN NOT wait to find out my baby’s gender, I’m going to the doctor, in 15 minutes and bringing my laptop with me for the waiting room. If it already has a gender, I will tell the nurse to do an ultrasound. I have two other kids, but we didn’t want to find out their gender. And that was 8 years ago, so all help is appreciated!