How does the Lippes Loop work as a contraceptive?

The Lippes Loop prevents pregnancy through several mechanisms:

• Physical Barrier: Its presence in the uterus acts as a physical barrier to sperm, making it difficult for sperm to reach and fertilize an egg.
• Altered Uterine Environment: The device alters the lining of the uterus, making it less suitable for implantation of a fertilized egg.
• Immune Response: The presence of the loop can cause a mild inflammatory reaction in the uterus, which is toxic to both sperm and eggs.

These combined effects make the Lippes Loop an effective form of contraception.