Exhibit 12

Wyeth

Computation of Ratio of Earnings to Fixed Charges

(in thousands except ratio amounts)

	Nine Months Ended September 30, 2006		Year Ended December 31,
			2005		2004		2003		2002	2001
Earnings (Loss):
Income (loss) from continuing operations before income taxes	$4,335,300		$4,780,589		$(129,847	)	$2,361,612		$6,097,245	$2,868,747
Add:
Fixed charges	466,670		461,431		360,805		346,564		430,449	439,058
Minority interests	22,538		26,492		27,867		32,352		27,993	20,841
Amortization of capitalized interest	16,665		21,356		9,350		8,772		8,866	2,497
Less:
Equity income (loss)	(479	)	(104	)	(524	)	(468	)	20,766	70,372
Capitalized interest	51,350		46,450		86,750		115,800		88,008	94,257
Total earnings (loss) as defined	$4,790,302		$5,243,522		$181,949		$2,633,968		$6,455,779	$3,166,514
Fixed Charges:
Interest and amortization of debt expense	$371,709		$356,834		$221,598		$182,503		$294,160	$301,145
Capitalized interest	51,350		46,450		86,750		115,800		88,008	94,257
Interest factor of rental expense (1)	43,611		58,147		52,457		48,261		48,281	43,656
Total fixed charges as defined	$466,670		$461,431		$360,805		$346,564		$430,449	$439,058
Ratio of earnings to fixed charges	10.3		11.4		0.5		7.6		15.0	7.2

(1) A 1/3 factor was used to compute the portion of rental expenses deemed representative of the interest factor.