the status of the villager is not important to get the GC - but if you have a Master Parent - they will start breeding when you arent looking as soon as someone dies and if you arent careful that child will be weaned before you have a chance to dunk the nursing mother.....then you will be right back where you started... so best bet would be change that Villagers preference and teach them something else, so you will be present when your next baby is born and before its weaned......