It's an anagram for 'Spiro Agnew'
I could see how this would be a problem for female scientists. Or, for that matter, for those already gifted with one such organ. Sharks have two penises, but few human males can adequately manage the one they're born with, much less an extra one.
But the article linked to clarifies the matter: the appendages in question were grown in a lab.
Dick Cavett used to be quite amused by the fact that "Grow a penis" is an anagram for "Spiro Agnew." Pehaps this story will afford Mr. Cavett a moment of nostalgia.