Starfish Food

I am trying to do my best at guessing the different approaches that people are using these days when they are learning how to conceive a girl. I know that for years there were a number of old wives tales that could predict what you were having but not necessarily actually helping you get a certain sex over the other. When I read further about different Ph levels in the body that can contribute to the sex I wondered then how those levels can be played with. Is it a strict diet that is followed and do both the man and woman have to be on it?