from a statistical point of view you're right, but I think what the question is, is what are the ways of changing those odds. There are biological factors, as momoja and xero pointed out, that affect how each pregnancy occurs. If you don't take any of those factors into consideration, then on average, over hundreds and thousands of pregnancies, you come out 50/50, but she's only concerned with THIS pregnancy, and using some of the methods described could affect those odds, even if it's making it 51/49 or 52/48, in the end it's going to be either a boy or a girl, so the raw odds are 50/50.nwcrazy said:This is what I learned years ago while working towards my BS in molecular biology.
And this is what I learned from statistics. Each pregnancy is an independent event. For example, if you already have 2 girls, the chances of having a 3rd child be a girl is still 50/50.