S-1/A 1 endra_s1.htm S-1/A As filed with the Securities and Exchange Commission on April 18, 2023 Registration No. 333-271003 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-1 (Amendment No. 1) REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ENDRA LIFE SCIENCES INC. (Exact name of registrant as specified in its charter) Delaware 3845 26-0579295 (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial Classification Code Number) (I.R.S ...