<prompt> The failure rate of TODAY is lowest in:NulliparaMultiparaGrand multiparaSame in all Does not depend on parity  <response>: - Today is a Vaginal sponge. Vaginal sponge It is a small polyurethane foam sponge measuring 5 cm x 2.5 cm, saturated with the spermicide, nonoxynol-9. The failure rate in parous women is between 20-40 per 100 women-years and in nulliparous women about 9-20 per 100 women years. Barrier method - Has a high failure rate; only consistent use for 2 years. - Has advantage of HIVSTI protection but a healthy couple may not need it. 