How can I tell if im having a boy or girl?

You can typically find out the sex of your baby via ultrasound. This will be performed between 18 and 20 weeks. The ultrasonographer will look at your babys image on the screen and examine the genitals for different markers that suggest boy or girl.

Whats the possibility of having a girl?

Not Quite 50/50: Understanding the Odds of Having a Boy or a Girl. According to the World Health Organization, for every 105 boys born globally, there are about 100 girls born. This is called the sex ratio at birth.