IVF Insurance coverage

aleхιѕ • VERY proud mother!! Married тo мy вeѕт ғrιend, and perѕυιng мy D.N.M. (docтor oғ naтυral мedιcιne)
After reading a few posts I am coming to the understanding that there are some insurances that cover <a href="https://glowing.com/glow-fertility-program">IVF</a> 100% which insurances do this and what is the "minimum time" for lack of a better term that is required to be with these insurances before you can take advantage of the benefit? 
Also are there any that cover gender selection? We have girls from previous relationships, have been unable to have a child with each other for years now and we really want a boy to complete our family.. Thanks!!