Are Angelina And Brad Reproductively Challenged?

Angelina Jolie and Brad Pitt went with costly in vitro fertilization to conceive twins Knox Leon and Vivienne Marcheline, according to Us Weekly. A source told the magazine, "They conceived through in vitro fertilization. They both desperately wanted more babies soon." The source added that the couple chose in vitro so Angie "wouldn't have to deal with the stress of trying to get pregnant."

Though we called this weeks ago, we gotta ask - was it really to avoid the "stress" of getting pregnant, or was it because these two were having trouble getting pregnant in the first place? Though Brad is smoking hot, he is 44, which is getting up there - perhaps he was having some technical difficulties? Additionally, the chance of someone having fraternal twins at Angelina's age (33) without fertility treatments is under 1 percent, but with in vitro, the chances shoot up to 25 percent.