Quit yellin', it's only childbirth

The New York Daily News reports on the Tom Cruise/Katie Holmes pregnancy, from the standpoint that Scientology, which Cruise practices, encourages silent childbirth:

Practitioners of Scientology are against drugs but insist on "silent birth" because they believe it's traumatic for babies to hear their mothers groan or cry.
...
Scientologists also favor seven days of silence for newborns so their first week on Earth is trauma-free.

Um... has anyone ever told them that the womb is a very noisy place? I mean, I'm all for a calm, gentle birth, but a newborn is more likely to be shocked by the silence than disturbed by the noise.