Reason for improved semen quality is optimal temperature inside testis once the weight of previously obese person is reduced.
In some cases this is not enough, there is a medical condition called “Varicoceles” which basically means too many blood vessels close to the testis, keeping the temperature too high and reducing the semen quality.
This condition can be treated with a surgery, removing some of the blood vessels.
I hope this comment will be helpful to someone trying to have a child.
Varicocele also offers mild pain in the groin and sometimes the testes too. I freaked out and thought I had testicular caner before I was told it was varicocele.i never wound up getting surgery, and I haven’t really had any issues with it I. The past couple of years. Sorry if it’s TMI.