OvuGel® is covered by:

U.S. Patent No. 7,205,281
U.S. Patent No. 8,530,419
U.S. Patent No. 8,905,913
U.S. Patent No. 8,937,044
U.S. Patent No. 5,985,320
U.S. Patent No. RE42072
U.S. Patent No. 9,352,011
U.S. Patent No. 9,351,818