Transplanted penis produced pregnancy, but maybe without much fun

A man in South Africa who underwent a penis transplant has impregnated his girlfriend, according to news reports.

But it's not clear whether the man's transplanted penis works the same way an undamaged penis would, said Dr. Andrew Kramer, a urologist at the University of Maryland Medical Center (who wasn't involved in the transplant).

The penis is not necessary for a man to ejaculate or urinate, so it's possible that the man's transplanted penis doesn't function completely normally, Kramer said. Ejaculation is controlled by the spinal cord and does not require the penis; the rhythmic contraction of pelvic muscles forces semen outward, as if from the bulb of a syringe, he said.

It's possible the man could ejaculate without the penis getting erect, he added. "Maybe ejaculate just dripped out," and he got the woman pregnant, Kramer told Live Science.

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