There are 3 main hormones when it comes to swaying (there are others as well for ttc but I'm not talking about those): Progesterone Estrogen and Testosterone.
For ttc a girl you want:
Dw (darling wife) to have low estrogen, low testosterone, high progesterone (but not to high as it will delay O.
Dh (darling husband) to have low testosterone,and high estrogen
For ttc a boy you want:
Dw to have high estrogen, high testosterone and low progesterone (not low in the 2ww however
Dh you want high testosterone, and low estrogen.
There are supplements and drinks you can take to alter your hormones to sway for boy or girl. These are listed in the FAQ section. You also alter hormones by exercise (cardio girl, weights boy), and diet.
An interesting finding found in a Chinese study was that cycles have an average temp range. Then, every now and they your pre-o temps will be higher than normal. This would favor girl (means progesterone is higher). Then every now and they your pre-O temps are lower than normal. This would favor boy (means progesterone is low and estrogen is up). So you will know your supplements are working if you can adjust your temps to either above or below your average for the gender you are ttc. I will go into a deeper explanation of this in another post