GEN149 The Mishna states in Yevamot 65b that the Torah’s commandment to “be fruitful and multiply” only applies to a man, obligating him to try to sire at least one son and one daughter.  Therefore, when a couple has been married for ten years without having children – at which point it is assumed that they cannot have children together as a couple – the husband is entitled to a divorce, since he cannot fulfill the commandment to have children with this wife, but may be able to do so with another woman (Yevamot 64a; see also Shulchan Aruch EH 154:10).  EYES 163