HI, Just wanted to say that for my two it was right, but my BF is preg with a girl, and she was in boy biorhythm time, amd a previous poster who swayed girl with both her DH and her in girl biorhythm (in swaying attempts and outcomes) is expecting a boy. If you google it you will find a study by a Professor in Washington I think who basically says it is 50/50 and not to expect a certain gender. My own thoughts are this - it cant hurt to wait til u r in the correct month, it depends how long u want to wait to ttc and how many chances over the year that u want. Obviously this will reduce the number of times u can try. If you think about it, it is saying that every woman of X age who conceive during Y week during Z month will have a boy/girl accordingly. If this was so, I think it would have been pretty ease to prove scientifically and all over the world there wouldn't be eg unwanted girls in India/China etc.
I was in "boy time" this preg, and dont yet know the gender, I swayed girl but didnt bother to check the "cosmic" aspects, I will update when I find out!
Good Luck!