What does it mean to gestate with gender bias?

i've hear populace sayign they dont want to know the masculinity of their unborn child because they don't want it to gestate next to femininity bias. what does it anticipate?
Answers:

Where is the best place to find answers/or ask question, on women's condition?

Its the misguided belief that by HOPING they'll own a girl, and they appendage up have a boy, that the child will be more prone to develop feminine tendency and vice versa (male to womanly bias).