Definitions for "Male factor"
Usually refers to a low sperm count or problems with sperm function that make it difficult for a sperm to fertilize an egg under normal conditions. Male factor infertility may involve an inability to ejaculate, the presence of a varicocele, cryptorchidism (failure of one or both testicles to descend into the scrotum), or chromosome abnormality, vas deferens obstruction or exposure to environmental toxins or drugs.
Any cause of infertility due to low sperm count or problems with sperm function that make it difficult for a sperm to fertilize an egg under normal conditions.
Problems with sperm production can be classed together as Male Factor infertility. These may include low sperm count, high levels of abnormal sperm, problems with swimming patterns, a vasectomy or failed vasectomy reversal or blockages.