The vaginal environment can impact the efficacy of sperimicidal gels

According to a study from the United States, "the theological properties of four commercially available spermicidal gels (two polyacrylic acid derivatives and two carboxymethylcellulose based) and their dilutions with a vaginal fluid simulant (pH 4.2) and a semen simulant (pH 7.7) were measured at 25 degrees C and 37 degrees C over a biologically relevant range of shear rates."

"All four gels were shear thinning with temperature-dependent theological properties. The two types of gels responded differently to dilution. The theological properties of the polyacrylic acid derivative...

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