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Ionized calcium in human seminal plasma. 1983

S Arver, and H E Sjöberg

A low concentration of ionized calcium (Ca++) - 2-4% - was found in human seminal plasma with a calcium sensitive electrode. The mean level of ionized calcium (measured after a standardized air exposition) was 0.17 mM +/- 0.05 (s.d.) (range 0.09-0.29 mM). Dilution of the seminal plasma gave a linear decrease in free calcium concentration. Freezing and thawing or storage of the seminal plasma under anaerobic conditions did not influence the level of ionized calcium. Storage under aerobic conditions gave a temperature dependent decrease in which Ca++ parallelled a spontaneous increase in pH. Spermatozoa in semen samples with an ionized calcium level less than average had a better motility and viability than in semen samples with a higher Ca++ level.

UI MeSH Term Description Entries
D008297 Male Males
D002118 Calcium A basic element found in nearly all tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes. Coagulation Factor IV,Factor IV,Blood Coagulation Factor IV,Calcium-40,Calcium 40,Factor IV, Coagulation
D002413 Cations, Divalent Positively charged atoms, radicals or groups of atoms with a valence of plus 2, which travel to the cathode or negative pole during electrolysis. Divalent Cations
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D012661 Semen The thick, yellowish-white, viscid fluid secretion of male reproductive organs discharged upon ejaculation. In addition to reproductive organ secretions, it contains SPERMATOZOA and their nutrient plasma. Seminal Plasma,Plasma, Seminal

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