Types of IUDs
The IUD is the most common reversible method of contraception worldwide, and it is gaining popularity amongst women in the U.S. Today, women can choose between two different IUDs: the copper-releasing device (Paragard) or the progestin-releasing device (Mirena).
Copper T380A IUD (Paragard)
Copper wire wound around the T-shaped frame
Copper ions interfere with sperm mobility and incite a foreign-body reaction that results in a spermicidal environment
Approved to remain in place for up to ten years
Patients may learn more about Paragard at http://www.paragard.com (Please note: provision of this link does not imply UMHS endorsement of the content on the Paragard website).
IUDCPCopperT380A.gif by ASwann at en.wikipedia [Public domain], via Wikimedia Commons. No higher resolution available.
Levonorgestrel IUD (Mirena)
T-shaped frame contains the progestin, levonorgestrel
Progestin thickens cervical mucus, creating a barrier to sperm, and thins the endometrium approved for up to five years of use
Patients can learn more about Mirena at http://www.mirena-us.com. (Please note: provision of this link does not imply UMHS endorsement of the content on the Mirena website).
Mirena IntraUterine System.jpg by Hic et nunc (Own work) [Public domain], via Wikimedia Commons.