Natural methods of birth control include fertility awareness-based methods, diaphragm, condoms, and the copper IUD or Paragard.
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.
The hormonal IUD is different from all types of hormonal birth control in that it does not suppress ovulation and therefore can permit natural cycling.
Other benefits of the hormonal IUD are that it dramatically decreases menstrual flow and can relieve symptoms of endometriosis.