In order to make such a momentous decision, I insist that you learn the very interesting evolutionary biology behind it.

Start with this paragraph:

But for modern medical science, a baby’s sex would remain unknown until birth. But many mothers today know long beforehand whether a baby will be male or female. Routine ultrasound scans reveal fetal genitals a third of the way through pregnancy, and genetic tests identify sex even earlier. Yet basic questions remain. Is a baby’s sex like coin tossing, or can the male:female ratio be skewed? If sex bias occurs, does it happen through sperm sorting before fertilization or mortality differences in the womb after conception?

Then, CLICK HERE to read the rest of the story, by Robert Martin, expert on such things.