How many births per month in the us?

There seems to be a consensus that the month with the most births is September. The two article links below seem to conflict some. One was written in 2004 and the other in 2005, so the data shouldn't differ too much. Both include September in their lists of which month has the most babies. The article from WebMD says that the most births happen between September and November. The article from ABC News says that August is the most productive month, with September closely behind.

The articles also found that the least amount of births are at the beginning of the year, January or February. But interesting, most births happen between 10 am and Noon.

http://www.webmd.com/content/Article/85/98578.htm

http://abcnews.go.com/Health/Science/story?id=945911&page=1&CMP=OTC-RSSFeeds0312