Exhibit 12



Wyeth

Computation of Ratio of
Earnings to Fixed Charges

(In thousands except ratio amounts)





|                                                             |  |                         |           |      |   |           |      |  |   |           |   |  |      |         |   |  |   |           |  
|------------------------------------------------------------ |  | ----------------------- | --------- | ---- | - | --------- | ---- |  | - | --------- | - |  | ---- | ------- | - |  | - | --------- | -
|                                                             |  | Year Ended December 31, |          
|                                                             |  | 2007                    |           | 2006 |   |           | 2005 |  |   | 2004      |   |  | 2003 |        
|Earnings (Loss):                                             |  |                         |           |      |   |           |      |  |   |           |   |  |      |         |   |  |   |           |  
|                                                             |  |                         |           |      |  
|Income (loss) from continuing operations before income taxes |  | $                       | 6,456,682 |      | $ | 5,429,904 |      |  | $ | 4,780,589 |   |  | ($   | 129,847 | ) |  | $ | 2,361,612 |  
|                                                             |  |                         |           |      |  
|Add:                                                         |  |                         |           |      |   |           |      |  |   |           |   |  |      |         |   |  |   |           |  
|Fixed charges                                                |  |                         | 754,290   |      |   | 625,513   |      |  |   | 461,431   |   |  |      | 360,805 |   |  |   | 346,564   |  
|Minority interests                                           |  |                         | 23,277    |      |   | 29,769    |      |  |   | 26,492    |   |  |      | 27,867  |   |  |   | 32,352    |  
|Amortization of capitalized interest                         |  |                         | 24,240    |      |   | 22,465    |      |  |   | 21,356    |   |  |      | 9,350   |   |  |   | 8,772     |  
|                                                             |  |                         |           |      |  
|Less:                                                        |  |                         |           |      |   |           |      |  |   |           |   |  |      |         |   |  |   |           |  
|Equity income (loss)                                         |  |                         | 130       |      |   | (317      | )    |  |   | (104      | ) |  |      | (524    | ) |  |   | (468      | )
|Capitalized interest                                         |  |                         | 79,600    |      |   | 71,400    |      |  |   | 46,450    |   |  |      | 86,750  |   |  |   | 115,800   |  
|Total earnings as defined                                    |  | $                       | 7,178,759 |      | $ | 6,036,568 |      |  | $ | 5,243,522 |   |  | $    | 181,949 |   |  | $ | 2,633,968 |  
|                                                             |  |                         |           |      |  
|Fixed Charges:                                               |  |                         |           |      |   |           |      |  |   |           |   |  |      |         |   |  |   |           |  
|Interest and amortization of debt expense                    |  | $                       | 616,983   |      | $ | 498,847   |      |  | $ | 356,834   |   |  | $    | 221,598 |   |  | $ | 182,503   |  
|Capitalized interest                                         |  |                         | 79,600    |      |   | 71,400    |      |  |   | 46,450    |   |  |      | 86,750  |   |  |   | 115,800   |  
|Interest factor of rental expense(1)                         |  |                         | 57,707    |      |   | 55,266    |      |  |   | 58,147    |   |  |      | 52,457  |   |  |   | 48,261    |  
|Total fixed charges as defined                               |  | $                       | 754,290   |      | $ | 625,513   |      |  | $ | 461,431   |   |  | $    | 360,805 |   |  | $ | 346,564   |  
|                                                             |  |                         |           |      |  
|Ratio of earnings to fixed charges                           |  |                         | 9.5       |      |   | 9.7       |      |  |   | 11.4      |   |  |      | 0.5     |   |  |   | 7.6       |  



|(1) | A1/3factor was used to compute the portion of rental expenses deemed representative of the interest factor.
|--- | -----------------------------------------------------------------------------------------------------------