bastardy_pregnancy_announcement_effect

bastardy_pregnancy_announcement_effect = {
	custom_tooltip = bastardy_pregnancy_announcement_tooltip
	if = {
		limit = {
			this = scope:mother
		}
		bastard_pregnancy_mother_announcement_effect = yes
	}
	else_if = {
		limit = {
			exists = scope:mother.pregnancy_assumed_father
		}
		bastard_pregnancy_married_mother_announcement_effect = yes
	}
	else = {
		bastard_pregnancy_unmarried_mother_announcement_effect = yes
	}
	if = {
		limit = {
			is_ai = no
		}
		add_character_flag = {
			flag = tutorial_reactive_advice_bastards
		}
	}
}

As written in game/common/scripted_effects/00_bastard_effects.txt.