SPERM STILL SWIMMING?

I wanna get my women pregnant and its been 8months. I have 3 sons and a daughter from previous relationship. My sperm is still hot and swimming. I eat healthy and workout often. Im 6'feet 3" tall, 202lbs very fit. My girl says i need a sperm analysis done but we have sex 3to5 times a everyday. She has a 10month old from her pass relationship and wants another. She's 20yrs.old am im 40yrs.old. What do y'all think?