The copper IUD or coil (ParaGard) is a non-hormonal method of birth control. Its main advantage over hormonal methods is that it contains no contraceptive drugs and therefore permits natural, ovulatory cycles.
Hormonal IUDs are different from all types of hormonal birth control in that they do not suppress ovulation and therefore can permit natural cycling.
Other benefits of hormonal IUDs are that they can dramatically reduce menstrual flow and relieve symptoms of pain and endometriosis.
The vagus nerve is a cranial nerve that activates the parasympathetic nervous system and increases levels of oxytocin and the calming neurotransmitter acetylcholine. Supporting the vagus nerve and thereby improving parasympathetic tone promotes relaxation, sleep, digestion, and healing.
Activating the parasympathetic nervous system dials down the sympathetic nervous system or fight-or-flight response. In that way, the vagus nerve acts as a built-in “stress-reset button.”
Natural or non-hormonal contraceptive methods include fertility awareness-based methods, the diaphragm, condoms, and the copper IUD or Paragard.