100% down to whether the sperm that gets to the egg contains an X or a Y chromosome. Only way to guarantee that would be in a lab and against current ethic laws. Anything else is pure luck / coincidence! I worked in genetics research for 10 years x
@Tali there's the scientific words I was looking for haha
@Stephanie haha you’re all good, it’s still in my brain, just about!
I have not but I've heard of it and I think it works for people by coincidence. Whole heartedly it comes down the man lol. My father has a lot of girls in his family and he had 4 girls, I think that's how it works lol.