Birth control can never be 100 percent effective, and this woman is proof. Elizabeth, a mom and blogger behind Motherhood: A Descent Into Madness, joined HuffPost Live's Nancy Redd to explain how she got pregnant a total of four times, even after she'd gotten an IUD and had her tubes tied.

Hear Elizabeth's story in the video above, and click here to watch the full HuffPost Live conversation about pregnancies that defy the odds.

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