Male fertility decline with falling sperm counts. Worrying trend in male fertility. See link below.
https://www.theatlantic.com/family/archive/2018/10/sperm-counts-continue-to-fall/572794/
Male reproductive health has to be the focus in years to come. Interesting article about fertility in the future. See link below
https://academic.oup.com/humrep/article/33/4/541/4838372