There is a programme that is available over the internet called A-Gender, unfortunately googling it doesn't bring it up. This programme works mostly with environmental changes, which is the latest thing in gender swaying. They have available for purchase supplements cook books and personalised programmes (as well as other stuff).

There are also other methods that include collecting DH/DP's sperm and inseminating it with additives to help aid one type of sperm to reach the egg forst...

lots of info out there!! It's very overwhelming. My advise is, do your research

Tanya