Exhibit 12



Wyeth

Computation of Ratio of
Earnings to Fixed Charges

(in thousands except ratio amounts)





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



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