If the patient only has a mild case of weak spermatozoa, then the chances of getting pregnant naturally are still relatively high, but if the patient has a severe case of weak spermatozoa, then the chances of getting pregnant naturally are lower. Weak spermatozoa usually refers to low sperm motility, usually less than 25% of A-grade sperm. There are many reasons for weak spermatozoa, such as varicocele, orchitis, epididymitis, prostatitis, etc. The chances of getting pregnant naturally depend on the degree of weak spermatozoa. The chances of getting pregnant naturally with weak sperm need to be judged according to the degree of weak sperm, if the patient is only mildly weak sperm, then the chances of getting pregnant naturally are still relatively high, but if the patient is severely weak sperm, then the possibility of getting pregnant naturally is very low, no matter whether it’s mildly or severely, the chances of getting pregnant naturally are lower than normal people. Men should actively prepare for pregnancy medical examination, if there is weak spermatozoa need to be through the semen routine examination, hormone level testing, chromosome typing and other examination programs to clearly diagnose the cause of the disease, and under the guidance of the doctor to carry out treatment.