You asked: What are the odds of having the same gender again?
Couples with 4 children: 12.5% of couples have 4 girls or 4 boys, 37.5% will have 1/3 and 50% will have 2/2. Couples with 5 children: 6.25% have 5 the same sex and in couples with 6 children, 3.125% will have the same sex. How common is it to have a boy and a girl? …