The affixes aṇ and yat come in the sense of 'made' after uras in the Instrumental -3rd case in construction.,
The यत् is drawn into the sutra by the particle च ॥ उरसा निर्मितः = औरसं꣡ 'own son not adopted, lit. produced through the loins,' With यत् the form will be उरस्यः॑ ॥ These words denote son, and not anything produced from the loin, because the word संज्ञायां 4.4.89 governs this sutra also.,