It was wrong for me, it said boy, and I'm having a girl!!
I did one with the month I concieved and my age, it was wrong. Said I was gonna have a boy(which I secretly wanted so bad) but nope im happily 34wks with my second baby girl:) so I dont believe them I just believe its a guess && just to have fun:) goodluck hun
The Chinese charts I done said I was having a boy, and the old wifes tale quiz said I was having a girl. Im having a girl. :)
I think they are pot luck if they are correct it is a 50/50 chance.
I used the chinese gender chart. Worked for me!