The 2005 edition of William's Obstetrics provides the following instruction:
			"... Our policy is to clamp the cord after first thoroughly clearing the airway, all of which usually requires about 30 seconds."
	Cunningham FG, Hauth JC, Leveno KJ, Gilstrap L III, Bloom SL, Wenstrom KD, eds, Williams Obstetrics - Twenty-second edition, New York: McGraw-Hill Medical Publishing Division, 2005.
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