A second ejaculation an hour later contains 70% of the amount of sperm of the first ejaculate. L
Theriogenology 1999 Oct 15;52(6):981-6 Semen quality in dogs and the influence of a short-interval second ejaculation. England GC. Department of Farm Animal and Equine Medicine and Surgery, Royal Veterinary College, University of London, Hatfield, Herts, England. Semen quality was examined in each of 65 known fertile dogs. Values were found to be similar to those previously published, although an apparent breed influence was demonstrated, with German shepherd dogs producing ejaculates of larger volume and greater total spermatozoal output than other breeds. A second ejaculate was collected from each dog with a mean interval of 63 min. The second samples had significantly lower values for the volume of the second fraction, the spermatozoal concentration and the total spermatozoal output. There were no differences for the percentage motility or the percentage of morphologically normal live spermatozoa. While there was no increase in semen quality of the second ejaculate, the technique may be useful since it results in the collection of approximately 70% more spermatozoa than a single ejaculate. These spermatozoa also had normal motility and morphology and could, therefore, be used for insemination or cryopreservation. ========================================================= "Magic Commands": to stop receiving mail for awhile, click here and send the email: mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20NOMAIL to start it up gain click here: mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20MAIL E-mail [EMAIL PROTECTED] for assistance. Search the Archives... http://apple.ease.lsoft.com/archives/ckcs-l.html All e-mail sent through CKCS-L is Copyright 2002 by its original author.
