How long should I wait until I take the second test? December 22, 2024 21:16 Sperm values can change over time. You can confirm your initial results with a second test in about 2-4 weeks. Related articles Where do I throw the device once, I’m done using it? What are the 5 parameters that YO tests? How long should I wait until I take the third test? How do I connect YO to my phone? Who can I contact if I have a question regarding the results?