Okay, but I’m not finding that phrase either.
[/FONT] lists prevention of implantation under Clinical Pharmacology. The prescribing information is provided by the company for medical professionals. Just scroll down to the heading clinical pharmacology. It states: …Possible mechanism(s) by which copper enhances contraceptive efficacy include interference with sperm transport, or fertilization, and prevention of implantation.
From Mirena physician information:
[FONT=Helvetica-Condensed]Studies of MIRENA prototypes have suggested several mechanisms that prevent pregnancy: thickening of cervical mucus preventing passage of sperm into the uterus, inhibition of sperm capacitation or survival, and alteration of the endometrium.[/FONT]
From Planned Parenthood:
IUDs also alter the lining of the uterus. In theory, this may prevent pregnancy by preventing the implantation of a fertilized egg — but this has not been scientifically proven.