The level of effectiveness expected by women who follow the printed
instructions exactly, and who use Today® Sponge every time they
The level of effectiveness which can be expected by a large group of
women, some of whom either fail to use Today® Sponge correctly
or do not use it every time they have intercourse.
This suggests that increasing familiarity with the sponge increases
success with it.
The figures described above
are taken from the full range of clinical research conducted with Today®
Sponge. Although other efficacy rates are sometimes cited for Today® Sponge, such rates are not based on
the sum total of the worldwide data
that were submitted for approval of the product.
Because Today® Sponge is made
in one size, questions have been raised concerning whether its efficacy
might be altered in parous women (women who have borne a child) due to
possible enlargement of the vagina after childbirth. A difference in
efficacy based on parity would not be expected, as the
of action of Today® Sponge is the release of spermicide into the vagina,
which would not differ between women who have or have not borne a child.
In fact, the combined data from all centers — U.S. and international —
participating in the clinical trials, demonstrate that there is no
significant difference;in efficacy between women who are parous and those
who are nulliparous (women who have not borne a child)., Today® Sponge is equally effective in all women, regardless of their
previous childbearing history.