Sept. 25, 2009 — The media have been buzzing with reports of a pregnant woman in Arkansas getting pregnant once more, with her babies conceived two and a half weeks separated.

Her case could be a rare example of “superfetation,” in which a pregnant lady ovulates and winds up with a second pregnancy.

But the key word there’s “might.” It’s not certain that Todd and Julia Grovenburg of Fortification Smith, Ark., have a superfetation pregnancy.

The Arkansas TV station that interviewed the Grovenburgs posted a articulation from Julia Grovenburg’s doctor, who confirms that Grovenburg is pregnant with twins and “there shows up to be a discordant growth design, conceivably due to superfetation.”

Her doctor, recognized as M. Muyalert, MD, says that superfetation is “an unordinary and uncommon condition, but the possibility is real.”

But Muyalert cannot confirm superfetation, expressing as it were that there’s a “doubt of superfetation” in the Grovenburgs’ case.

Jeffrey Kuller, MD, professor of obstetrics and gynecology at Duke College Medical Center, tells WebMD that based on the media reports he’s seen, he’s “skeptical” that the Grovenburg pregnancy may be a case of superfetation.

“It’s possible that this has occurred, but it’s certainly not for certain,” Kuller says.

Kuller says obstetrical textbooks specify a handful of reported cases of superfetation, but it’s “amazingly unprecedented” and is biologically “impossible,” although not implausible.

“The as it were way it can happen is if someone ovulates again after they get pregnant. But ordinarily, the hormonal state of pregnancy isn’t conducive to somebody ovulating once more,” Kuller says.

“We once in a while see a quiet like this, where you’ll see a inconsistency between the twin weights and development, and oftentimes, the more likely explanation is fair that one is slacking in development or one features a issue, like a chromosomal variation from the norm, that produces it smaller than the other one,” Kuller says.

It’s conceivable that the Grovenburgs’ moment infant wasn’t discovered prior during the pregnancy, notes Kuller, who says he had a persistent with a suspected case of superfetation several years ago but no certain cases of superfetation.

One of the challenges of a superfetation pregnancy would be timing the conveyance of the babies, Kuller says.

“On the off chance that you truly believed it was a superfetation pregnancy, you would have to be compelled to decide the most excellent time for both of the babies to be conveyed,” he says, noting that twins are ordinarily conveyed at 38 weeks.

But what in case one child was conceived a few of weeks ahead of the other one? At that point it’s a matter of finding a compromise conveyance date that would be best for both babies, “so that one didn’t go post-term and the other preterm,” Kuller says.

“But once more,” Kuller says, “this would be such a rare occasion that there would be no way to say, based on the final 10 we did … or based on the literature, usually how you should take after such a pregnancy.”

Within the couple’s meet with Arkansas TV station KFSM, Julie Grovenburg says the babies, Jillian and Hudson, show up “impeccably healthy” and are due in early December. She says that to prove superfetation “without a shadow of a question, would got to be something that was done after the babies are born.”

But doctors may never be able to tell the Grovenburgs for beyond any doubt in case their babies came from a superfetation pregnancy.

“I do not think there would be a definitive way to do that,” Kuller says. “I think it would still be theoretical.”