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Zacur, a reproductive endocrinologist at Johns Hopkins, also had doubts.

Although doctors know that sperm needs a low acid (high pH) environment to survive, and would likely die eventually in the low pH of stomach acid, doctors also said that sperm comes in a protective fluid: ejaculate, a nourishing medium meant to protect the sperm. The procedure, called dipi or direct intraperitoneal insemination, has largely been replaced by more effective methods.

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