A video of a 16-month-old baby swimming in a pool has stirred up some controversy. Some parents are questioning whether it's safe.

Adam Christensen posted a video on YouTube of his daughter, Elizabeth, swimming. She was trained by a professional instructor, he said.

She's trained and she knows that all she has to do is flip over. I love my little girl and Iwould never do anything that would hurt her, Christensen said.

He added that he is a registered nurse and his wife is a former lifeguard. Safety is his first priority, he said.

Elizabeth loves the water, Christensen said. She swims up to three times a day and can dive underwater to pick up toys.

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