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"Sperm cannot penetrate it?" That is a very shady fact. Even if technically sperm cannot penetrate the other discharge in the lab dish, many girls and women get pregnant at that time.
There are many different reasons now girls get pregnant even on pills and with condoms. The phrase is about a typical situation. Of course sperm can penetrate it when it, e.g., forms a one molecule thick layer. `'Míkka>t18:11, 21 November 2008 (UTC)[reply]
