Thanks for your query.
Oligospermia refers to semen with a low concentration of sperm. (normal count ranges between 50-150million/ml)
This is a common cause of male infertility
The diagnosis of oligospermia is based low counts on a semen analysis
performed on two separate occasions 2 months apart.
Treatment modalities are as follows:
Treating underlying cause like hudrocele, varicocele, or vas deferens obstruction.
Clomiphene citrate, tamoxifen, HMG, FSH, HCG, testosterone
, Vitamin E, Vitamin C, anti-oxidants.
Last resort would be ICSI, IVF.
Wish you good luck