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Published by Elsevier Ltd. The capacity of semen to raise the vaginal pH was also investigated in vitro. View PDF Download full issue. Objective: To explain the high frequency of heterosexual transmission of AIDS in subSaharan countries, by investigating post-intercourse semen retention in the vagina for local pH neutralization as a possible interference factor with acidic inactivation of HIV virions.

Conclusions: It is expected that Steve grand penis neutralization Holly davidson boobs pH will both favor male-to-female transmission and prevent the acidity-associated loss of infectivity of the female-derived virions, thus allowing female-to-male transmission during further sexual contact. Methods: Two semen markers, prostate-specific antigen and prostatic acid phosphatase, were measured and compared with the pH values in the vaginal washes of 69 women from the Central African Republic.

The specimens with high levels of markers group I displayed an almost neutral pH median 6. Recommended articles Citing articles 0.

The in vitro study confirmed the high neutralization capacity of semen. Under an Elsevier user. Key words Human vaginal fluid. Add to Mendeley Share.