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CLINICAL TRIAL
COMPARATIVE STUDY
JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL
Sperm antibodies and human in vitro fertilization.
Fertility and Sterility 1988 June
In order to directly evaluate the effects of sperm antibodies in human in vitro fertilization (IVF), the authors preincubated donor sperm in female sera containing sperm antibodies and then inseminated supernumerary human oocytes from a gamete intrafallopian transfer (GIFT) program. The sperm were incubated for 30 minutes in medium containing 20% serum with antisperm activity (Test); or no antisperm activity (Control) as assessed by the immunobead test (IBT). Each oocyte was inseminated with 1 to 2 X 10(5)/ml of the preincubated motile sperm with Control or Test treatments allocated on a random basis. Six positive sera were tested in 17 experiments, resulting in a fertilization rate of 41% (25/61) versus 84% (36/43) for controls (P less than 0.001). When considered individually, three of six positive sera caused significant inhibition. The only serum that gave complete inhibition had the highest titer for IgG (10,000) and lower IgA (100). Absorption with protein A reduced the IgG titer to less than 10 and removed the fertilization inhibitory activity. These results confirm that sperm antibodies from female sera can inhibit human IVF.
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