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. 2002 May;22(9):3046–3052. doi: 10.1128/MCB.22.9.3046-3052.2002

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Copyright © 2002, American Society for Microbiology

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FIG. 2. — Zona-intact (A) and zona-free (B) oocytes were incubated with sperm of Smcp^+/+ and Smcp^−/− mice, and in vitro fertilization was assessed by examination for male pronuclei and early development. The number of oocytes (no) incubated with sperm is given as 100%. The number of oocytes with two pronuclei (pn) and the number of oocytes that developed to the blastocyst stage (bl) appear above the bars, and the bars are the percentages of oocytes incubated that had two pronuclei or that developed to the blastocyst stage.