BT Er 18b(35) :מכלל דעד האידנא לאו כצלמו אוליד‏ : it may be inferred that previously he did not beget "in his image"
See the entire entry for hāydānā adv. now; today

BT Er 18b(35) :מכלל דעד האידנא לאו כצלמו אוליד‏ : this implies that until now (Adam) had not begotten a son in his image
See the entire entry for ˁaḏ prep. until