shettles method!!!

Kerri
Who here believes in shettles method?? My sister has kids conceived on day 11, day 15 or 16 and day 14 of her cycle...girl,boy,boy. My son was conceived on day 15/16 or 17. Looks to be pretty legit for us!!! Anyone else?! I'm hoping to try for a baby girl this time around :-) but obviously would be happy with a healthy baby no matter what!