Old Wives Tale? Effect of the Full Moon on Labor & Birth

I just heard this the other day. 

"More woman go into labor during a full moon."

I think that's so funny. But is it true?

I've done some Googling, of course, and I've read in more than one article stating that maternity units will actually have more staff on-hand during the times of full moons. Labor and Delivery areas can be twice as crowded as normal. "For years, workers in hospital maternity wards have claimed an uptick in women going into labor during a full moon. Some studies have shown that correlation is possible..."(Source: Moon Phases & Labor)

THE MOON'S GRAVITATIONAL PULL: 

"The moon’s gravitational pull effects the amniotic fluid in much the same way as it effects the water in the sea, rivers and even the water that’s otherwise found in our bodies.As a woman’s body prepares for natural childbirth, the amniotic sac becomes distended so the point where it will easily burst if put under pressure. Under normal circumstances, the pressure of labor contractions bursts the sac. During a full moon, the pressure caused by the moon’s effect on the water inside the sac can cause the same things to happen"(Source:http://www.firsttimepregnancy.com/176.html)

During the full moon, the high tide and low tide will be at their most extreme levels that day. 

When the moon is full or new, the gravitational pull of the moon and sun are combined. At these times, the high tides are very high and the low tides are very low. This is known as a spring high tide. Spring tides are especially strong tides. They occur when the Earth, the Sun, and the Moon are in a line. The gravitational forces of the Moon and the Sun both contribute to the tides.

I've also read that the barometric pressure has an influence on labor. Low barometric pressure induces rupture of the fetal membranes (when your water breaks) and delivery. Well, when it comes to the full moon, the barometric pressure becomes very low. 

Hmmm...Well that's kind of funky. 

WHEN'S THE NEXT FULL MOON?

Saturday, October 23, 2010. (This saturday.)

It's the full moon that occurs closest to the autumn equinox. (Also sometimes called the "Harvest Moon, Hunters Moon, Blood Moon".)