Is there a way of definitely having a girl the next time I get pregnant?

Not sure how true this is but I've read that the mommy-to-be avoiding orgasm may be the key to conceiving a baby girl. The female orgasm releases an alkaline secretion which may help boy sperm to survive longer, by creating a less hostile environment. Without these secretions, boy sperm may find it harder to survive, and have less chance of reaching the egg.