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Three commercial, nonspermicidal gels used in fertility practice were found to be toxic to sperm in a 24-hr sperm survival assay; these included Felis, Replens, and Aquasonic Gel, which is used for transvaginal ultrasound during ovulation monitoring. In contrast, Pre-Seed did not cause any sperm toxicity, suggesting its appropriate use by patients who are trying to conceive, as well as clinicians...
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