A woman has become the first on record to be diagnosed as pregnant from anal sex but it's not all what it's cracked up to be.

Of course, the scientific likelihood of somebody creating a human that way is a load of... you know what I mean? So you imagine how shocked Dr. Brian Steixner MD was when he came across a person who had supposedly done just that.

Steixner, Director of the Institute of Men's Health at Jersey Urology Group in Atlantic City, said that his patient's 'medical miracle' had actually boiled down to an earlier case of cloaca - a condition whereby a woman's foetus' bladder, vagina, and rectum are all linked from the same orifice as the intestinal and urinal functions.

The surgery that she later had was botched, leaving her uterus being connected to her rectum. A few years later, she became pregnant.

Dr. Steixner told Men's Health: "We knew about her condition, and we had followed her for a decade. After doing a whole bunch of X-rays, we determined that she got pregnant from having anal sex."

Even though the scenario seemed detrimental to a healthy birth, Steixner said that the "obgyns couldn't figure out a way to effectively deliver the baby through the rectum safely. So she had a C-section."

He told The Independent the case was "one in a billion and the rarest of the rare. I'm not sure it should be a big issue for women generally."