Dying for a boy your first time around or just looking to add a little guy to your brood of girls? Try these sex positions to help up your odds!. Many married couples find themselves asking the question of the best sex positions to conceive a baby boy, and this guide looks at some of the. These are the best sex positions to conceive baby boy. Deep penetration I believe, if you want to get pregnant with a boy you should be asking this question too. The position of sex (Also for Dad; see below.) L-Arginine.