Just about the same method, worked for me 33 years ago.
You are welcome to try it.
How To Conceive a Boy
Do not tell anybody but she was standing on her head within 2 seconds of my orgasm.
I think that is called being determined.
There are other details, read in the link provided.
My wife is a charting/reccord keeping freak, she keept records of many aspects of her cycle, definitely plus when using this method of conceiving.
You have to keep you testicles cool (low temp, loose boxers and pants) and rested (not used) until she calls you.