Well
In 2009, the average birthrate worldwide was 19.95 per 1000 population. Extrapolating that (19.95/1000 = x/7,000,000,000) gives us an annual birthrate of 139,650,000. Now, divide by 365 to get the average daily birthrate of 382,602 worldwide for 2009.
Hmm. Birthrate must be falling...