I saw this yesterday. Hope this helps! https://m.facebook.com/story.php?story_fbid=1093535384189960&id=224275207782653
I majored in human bio back in my degree. It’s practically impossible to control due to chromosomes.
Hmm. Some say male-female probability may b dependent on job nature, industry etc...
https://sg.theasianparent.com/food-for-conceiving-a-baby-girl