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Production of antibodies against hCG. A: Detection of antibodies against hCG in serum. Because the level of antibodies against hCG from first to second GnRH administrations was 1 ± 0.31, we considered that the antibody level was elevated significantly when the level of antibodies against hCG exceeded 1.31. Red and black lines indicate Ab (+) and Ab (–), respectively. B: Summary of this study. Data are shown as the mean ± SD.
