Billings Ovulation Method - this method is very effective pero studyhi lang gyud para makasabot mo. ma-plano ninyo ang gender sa inyong baby ani nga method.
Billings LIFE: Official Site of The Billings Ovulation Method
ang right side daw nga ovary is where male egg is produced. when male egg reached by male sperm, mao nay lalaki. when the egg of the right ovary is reached 1st by the female sperm, i-reject daw sa egg. so dapat pareha gyud sila male egg and male sperm.