I've heard there's different theories to determine the gender of your baby from the Matchmaker. One theory is that you push a certain button, another thoery is you should wait until the Matchmaker's book is closed or open and then press a button. The last theory is you should wait until the Matchmaker's mouth is open or closed. I need to make myself clear that all of this information are theories and nothing is certain to determine the gender of your baby when the Matchmaker comes. I hope I helped you with some information and you receive the gender you want.