Quoting October Rust:" The chinese gender calendar actually said my oldest daughter was going to be a boy! So I'm a little ... [snip!] ... and change my diet to more salty foods, red meats, eggs, beans, etc. Those are some tips I've read and heard about ttc a boy."
Every chinese gender chart I've seen, even the ones everyone says are 100% have told me my daughter should have been a boy, LOL.
They SAY that girl sperm is bigger and stronger while boy sperm is smaller and weaker. So humping less often "supposedly" makes girls and humping more often makes boys during ovulation that is.