The term ‘teratozoospermia’ applies to sperm morphology. However, more often than not, this condition is accompanied by the alteration of other semen paramteres. Morever, some diseases may present teratozoospermia or being what induces such morphological abnormalities.
It is characterised by having spermatozoa with abnormal composition and poor motility. The tail is a flagellum responsible for propelling the spermatozoon. Obviously, if the tail is underdeveloped or ill-shaped (the tail being spiral-like) the flagellum cannot its function, so the spermatozoon is not able to “run” or even stands motionless.
Condition that causes male sterility due to the alteration of three semen paramenters:
- Low concentration or amount of sperm in the ejaculate (hence oligo)
- Low or zero motility (astheno)
- Abnormal sperm morphology (terato)
OAT shows great variability, for it is the conjuntion of alterations, each one of them affecting sperm production to a greater or lesser extent. Since there are several factors involved, it seems that OAT is caused either by a genetic alteration or a hormonal imbalance. Both factors are closely connected to spermatogenesis, so these disorders would enatil a subsequent alteration of the sperm’s basic characteristics.
It is the enlargement of the veins of the spermatic cord, hindering normal blood flow. Mild varicocele may lead to infertility problems, and it is sometimes associated with the production of malformed sperm.