To repair Netzach-Hod-Yesod so that Chessed-Gevurah-Tiferet can be revealed over them requires the entire period of Pregnancy. And to repair Chessed-Gevurah-Tiferet so that Chochmah-Binah-Daat may be revealed over them requires the entire period of Suckling, for they are thus steadily drawn down in stages in the necessary way. Yet even so, the initial purification is not truly complete until the first twenty-four months of Suckling, because only then is the purification of Hod-Yesod-Malchut complete.