Complex sentence: Production of oxytocin during childbirth and lactation increases parasympathetic activity, thus reducing anxiety and theoretically fostering bonding, so it is generally understood that maternal oxytocin circulation can predispose women to form bonds and show bonding behavior.
Split into simpler sentences: Production of oxytocin during childbirth and lactation increases parasympathetic activity, thus, anxiety is theoretically reduced. Generally, it is understood that maternal oxytocin circulation can predispose women to form bonds and show bonding behavior.