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Zona-free hamster egg penetration test. In vitro fertilization test, the total number of eggs tested was 60(A group) and 62 (B group), respectively. Fertility rate has no significant difference between A (50 of 60, 83%) and B (48 of 62, 77%) group, **p > 0.05. A: Sperm blocked with pre-immune serum (1:200) for 5 h as control; B: Sperm blocked with RNase9 anti-serum (1:200) for 5 h.
