Ha! My name is Tanya to!! I am also TTC and trying to sway for a girl!! My husband and I have 4 boys already Robert (18), he is mine from a previous relationship, Tim(14), Taylor(12) and Thomas Hunter (10). Those 3 are my husband's from his first marriage. In Jan. we had his vasectomy reversed and could actually start trying in Feb.
From what I've read, and I've read alot

, if you should O around the 19th, then you should BD about 3 days before that. Female sperm are stronger than male, which means they live longer, but male sperm swim faster than female.

So, the concept is, if you BD about 2 to 3 days before O then by the time you O all the male sperm (should have) died off and there should be nothing but female sperm left!

If I can find the link to some of the stuff that I've read, I will post it here for you.
Good luck!! Keep me posted!!