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 Polyspermy 

Before you revert the stable version - please discuss this first on the talk page. As for your question:
Look at the beginning of the third line. The Talmud quotes the verse from 1 Samuel 17, 4, which goes as follows: ""And there went out a champion out of the camp of the Philistines"", right? Now, look at your Bible - ibid., and see the full verse: ""And there went out a champion out of the camp of the Philistines, named Goliath..."". Right?
So, the Talmud quotes the verse about Goliath, and then: interprates this verse - using a pun - in the following way (see the Talmud ibid. in that third line): ""One hundred foreskins of Philistines - got her [i.e. his mother] pregnant"". In other words: the Talmud explains, that the biblical words ""And there went out a champion"" - mean:  ""And there was created/born a champion"", and it also explains that the biblical words: ""out of the camp of the Philistines"", mean: ""out of a hundred foreskins of Philistines"". Note that this fantastic interpretaion made by the Talmud - is based on a pun: the word for ""camp"" is similar to (i.e. sounds like) ""a hundred foreskins"" (not in English of course). Note also that fantastic interpretaions for the Bible - are very common in the Talmud.
Now, look ibid. at the next line (i.e. the fourth line); The Talmud now explains how - having so many fathers - is really possible from a biological point of view, so the Talmud continues: ""Rav Matania said: no controversy over that; as long as the sperm [of the first man] hasn't gotten rotten [in the woman's body] yet, a woman can get pregnant by two men - all at once"".
Notice that all of the Talmud's commentators explain all of this - as I did.
Hope this helps. Anyway, next time, please consult pefore you revert the stable version.

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