The study nods to an often underdiscussed topic when it comes to fertility: men. An estimated 15 percent of couples face infertility issues, according to the Mayo Clinic, and male infertility plays a role in up to half those cases. But the burden of not being able to have children “falls disproportionately on women,” according to the World Health Organization Advisory Committee on Health Research.
Many infertility treatments are geared toward women, such as in vitro fertilization and drugs that stimulate ovulation and increase egg production. According to the University of Cambridge, research has shown that male fertility is “culturally invisible” and isn’t as openly talked about, even though it is just as common as infertility in women.
While heat may just be one factor in male fertility issues, a variety of others could also affect sperm production. Hormone imbalances, age, stress and lifestyle factors such as diet and drug use can also result in male infertility.