Current Problems in Fertility: Based on the IFA Symposium by A. Lima-de-Faria (auth.), Axel Ingelman-Sundberg, Nils-Olov

By A. Lima-de-Faria (auth.), Axel Ingelman-Sundberg, Nils-Olov Lunell (eds.)

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Additional resources for Current Problems in Fertility: Based on the IFA Symposium held in Stockholm, Sweden, April 2–4, 1970. Sponsored by Åhlen-stiftelsen, Sven och Dagmar Saléns stiftelse, and Roland Lundborg, M.D.

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1958; The Milk Marketing Board, 1968). Likewise, glycerol does not appear to have an adverse effect on human semen (cf. Sherman, 1954). However, when glycerol was added to boar semen, fertility was depressed markedly even without freezing the semen (Polge, 1956; King & MacPhearson, 1966) while the effects on motility were minimal (Polge, 1956; Hoffman, 1959). To clarify this difference between bull and boar semen a trial was conducted. Extracellular GOT was examined to study the contrary effects of glycerol on bull and boar semen.

I: 18 hours equll. 10 %glycerol. II: 5 " " 5 " " Nch of bulls: 6. 68 However the experiment was a small one and must be confirmed. Another small experiment performeg at Enkoping was the comparison between semen doses of 40 x 10 and 30 x 10 6 inseminated as deep-frozen semen in medium-straws. Three bulls were used and no significant difference in fertility results measured as 56 days NR-% was found. Field trial. Number of sperms. Enkoping 1968. Bull 85 R. 1260 R. 30 w. Total 40 x 106 AI No %NR 56 d.

Five specimens from four patients, whos spermatozoa in the whole semen had been zero were used. 7). In another series of experiments it was studied if the in,crease in Z02 when the spermatozoa were transferred to a salt solution was a general phenomenon or not. 001). If the cells were again suspended in the seminal plasma the oxygen consumption returned to the same level as before, indicating that the increase of Z02 could not be a result of the physical treatment of the spermatozoa. DISCUSSION So far Nevo (1966) is the only one, who has reported the respiratory rate of untreated spermatozoa in single ejaculates and also used a correction for the seminal plasma and the nonmotile cells.

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