Dear everyone,

I'm doing research on infertility and need to collect sperm from male mice's caudal epididymis. Sometimes the results are good but sometimes we can not get any sperms. I have been looking for the guideline or training documents on mice's reproductive engineering techniques but I really can not find any well-prepared ones. Can any specialist in this field help to give me a hint or a source of information about this technical issue?

Thank you very much for reading. Looking forward to hearing from you.