Question

What is the primary basis of action for IUDs in preventing conception?

Options

• Creating a physical barrier to sperm

• Blocking the fallopian tubes permanently

• Increasing phagocytosis of sperm and suppressing sperm motility

• Inhibiting FSH to prevent ovulation

Answer 1

Intrauterine Devices (IUDs) prevent conception by increasing phagocytosis (destruction) of sperm and suppressing sperm motility, making it difficult for sperm to reach and fertilize the egg. This mechanism makes IUDs highly effective contraceptive options suitable for long-term use.