Roughly 15 percent of American couples have trouble conceiving. Until as recently as a decade ago, the focus fell squarely on the woman. Men avoided seeing a doctor, fertility experts say, or, if they were dragged in by their partner, silently prayed the problem wasn’t theirs.

In many cases, “it's a virility thing,” with men erroneously fusing fertility with masculinity, says Stan Honig , a urologist and chief of reproductive and sexual medicine at the Yale University School of Medicine.

Today, things are starting to change. “More men are finally getting the fertility treatments they need,” says Leon Telis , director of the men’s health program at Mount Sinai Hospital in New York

( Sperm counts worldwide are plummeting faster than we thought. )

In part, this is because treatm

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