What color is sperm?
Jul 06, 2022
Source: Cainiu Health
Dr. Luo Yong
Introduction
Semen color is determined by its constituent components. Normal semen appears grayish-white or milky-white and is opaque. A pale yellow hue may occur after a prolonged period without ejaculation, resulting in slight color variation and increased viscosity—this is considered normal. However, if a male has an infection in the reproductive tract, semen may appear yellow due to purulent infection of the prostate and seminal vesicles.
Semen color is determined by its constituent components.
Normal semen appears grayish-white or milky-white and opaque. Freshly ejaculated semen has a viscous, jelly-like consistency. Within approximately five minutes, it begins to liquefy—a process known as semen liquefaction—which typically completes within 15 to 30 minutes.
A pale yellow hue may occur after prolonged abstinence, resulting in slight color variation and increased viscosity—this is considered normal. However, yellow semen may also indicate inflammation of the male genitourinary tract. Microscopic examination may reveal numerous pus cells, suggesting purulent infection of the prostate or seminal vesicles.
Red or light red semen—sometimes appearing brownish-red or soy-sauce colored—with numerous red blood cells visible under microscopic examination is commonly referred to as “hematospermia.” This condition is most frequently caused by seminal vesiculitis or prostatitis. In addition to bleeding, some individuals may experience associated pain.
Occasionally, vigorous or overly forceful sexual activity may cause minor rupture of capillaries in the genital organs, leading to transient hematospermia—a benign, self-limiting physiological phenomenon that resolves spontaneously.
