Exhibit 12

Wyeth

Computation of Ratio of Earnings to Fixed Charges

(In thousands except ratio amounts)



|                                                             |  |                                    |           |                         |      |           |  |      |           |   |      |   |           |      |  |   |          |   |  |   |           |  
|------------------------------------------------------------ |  | ---------------------------------- | --------- | ----------------------- | ---- | --------- |  | ---- | --------- | - | ---- | - | --------- | ---- |  | - | -------- | - |  | - | --------- | -
|                                                             |  | Nine MonthsEndedSeptember 30, 2008 |           | Year Ended December 31, |     
|                                                             |  |                                    | 2007      |                         | 2006 |           |  | 2005 |           |   | 2004 |   |           | 2003 | 
|Earnings (Loss):                                             |  |                                    |           |                         |      |           |  |      |           |   |      |   |           |      |  |   |          |   |  |   |           |  
|Income (loss) from continuing operations before income taxes |  | $                                  | 5,084,641 |                         | $    | 6,456,682 |  | $    | 5,429,904 |   |      | $ | 4,780,589 |      |  | $ | (129,847 | ) |  | $ | 2,361,612 |  
|Add:                                                         |  |                                    |           |                         |      |           |  |      |           |   |      |   |           |      |  |   |          |   |  |   |           |  
|Fixed charges                                                |  |                                    | 477,343   |                         |      | 754,290   |  |      | 625,513   |   |      |   | 461,431   |      |  |   | 360,805  |   |  |   | 346,564   |  
|Minority interests                                           |  |                                    | 14,678    |                         |      | 23,277    |  |      | 29,769    |   |      |   | 26,492    |      |  |   | 27,867   |   |  |   | 32,352    |  
|Amortization of capitalized interest                         |  |                                    | 24,200    |                         |      | 24,240    |  |      | 22,465    |   |      |   | 21,356    |      |  |   | 9,350    |   |  |   | 8,772     |  
|Less:                                                        |  |                                    |           |                         |      |           |  |      |           |   |      |   |           |      |  |   |          |   |  |   |           |  
|Equity income (loss)                                         |  |                                    | 582       |                         |      | 130       |  |      | (317      | ) |      |   | (104      | )    |  |   | (524     | ) |  |   | (468      | )
|Capitalized interest                                         |  |                                    | 52,100    |                         |      | 79,600    |  |      | 71,400    |   |      |   | 46,450    |      |  |   | 86,750   |   |  |   | 115,800   |  
|                                                             |  |                                    |           |                         |      |           |  |      |           |   |      |   |           |      |  |   |          |   |  |   |           |  
|Total earnings as defined                                    |  | $                                  | 5,548,180 |                         | $    | 7,178,759 |  | $    | 6,036,568 |   |      | $ | 5,243,522 |      |  | $ | 181,949  |   |  | $ | 2,633,968 |  
|                                                             |  |                                    |           |                         |      |           |  |      |           |   |      |   |           |      |  |   |          |   |  |   |           |  
|Fixed Charges:                                               |  |                                    |           |                         |      |           |  |      |           |   |      |   |           |      |  |   |          |   |  |   |           |  
|Interest and amortization of debt expense                    |  | $                                  | 381,963   |                         | $    | 616,983   |  | $    | 498,847   |   |      | $ | 356,834   |      |  | $ | 221,598  |   |  | $ | 182,503   |  
|Capitalized interest                                         |  |                                    | 52,100    |                         |      | 79,600    |  |      | 71,400    |   |      |   | 46,450    |      |  |   | 86,750   |   |  |   | 115,800   |  
|Interest factor of rental expense(1)                         |  |                                    | 43,280    |                         |      | 57,707    |  |      | 55,266    |   |      |   | 58,147    |      |  |   | 52,457   |   |  |   | 48,261    |  
|                                                             |  |                                    |           |                         |      |           |  |      |           |   |      |   |           |      |  |   |          |   |  |   |           |  
|Total fixed charges as defined                               |  | $                                  | 477,343   |                         | $    | 754,290   |  | $    | 625,513   |   |      | $ | 461,431   |      |  | $ | 360,805  |   |  | $ | 346,564   |  
|                                                             |  |                                    |           |                         |      |           |  |      |           |   |      |   |           |      |  |   |          |   |  |   |           |  
|Ratio of earnings to fixed charges                           |  |                                    | 11.6      |                         |      | 9.5       |  |      | 9.7       |   |      |   | 11.4      |      |  |   | 0.5      |   |  |   | 7.6       |  



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