How Does Gender Play a Role in a Family?

If the middle child is a different gender than the older and younger siblings, the quoto middle child sintrum does not typically affect him or her. Looking at my sister's family, for instance, she had three boys, and by the time her last pregnancy came around, she and her brother in law really wanted a girl. And so she's not only the youngest, but also the first girl. So in a way, she's getting the double a becol over indulgence of the youngest child right?