Vicks Baby Rectal Thermometer with Flexible Tip and Waterproof Design, V934 - Walmart.com
Rectal Thermometer Non-Mercury
Amazon.com : Frida Baby Quick-Read Digital Rectal Thermometer : Health & Household
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Amazon.com: Vicks Baby Rectal Thermometer Baby Thermometer for Rectal Temperature, Short and Flexible Tip with Fast Read Times and Large Digital Display : Health & Household
Rectal thermometers are the most accurate, says study