An erection is a physiological phenomenon in which the penis becomes firm, engorged, and enlarged that is the result of a complex interaction of psychological, neural, vascular, and endocrine factors.

ED is defined as the persistent inability to achieve or maintain an erection adequate for satisfactory sexual activity.

The common causes of ERECTILE DYSFUNCTION are hormonal imbalance, trauma, damaged nerves and blood vessels and pelvic injury drugs.

PE is defined as ejaculation that always or nearly always occurs prior to or within about one minute of vaginal penetration, or the inability to delay ejaculation on all or nearly all vaginal penetrations, coupled with negative personal consequences such as distress, bother, frustration and/or the avoidance of sexual intimacy.

The common causes of MALE INFERTILITY are sperm production, sperm blockage, sexual and hormonal problems.