Exhibit 32

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report on Form 10-KSB of Sontra Medical Corporation (the “Company”) for the fiscal year ended December 31, 2006 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Harry G. Mitchell, Interim Chief Executive Officer, Chief Financial Officer and Treasurer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/  Harry G. Mitchell

Harry G. Mitchell

Interim Chief Executive Officer, Chief

Financial Officer and Treasurer

March 29, 2007