%0 Journal Article %J Archives of Medical Science %@ 1734-1922 %V 4 %N 4 %D 2008 %F Sugiyam2008 %T Clinical researchImprovement of sperm motility by short-interval sequential ejaculation in oligoasthenozoospermic patients %X Introduction: The aim of this study was to evaluate the effect of a consecutive second ejaculate, i.e, to determine if it contains an equal, or even higher, number of motile sperm, and whether it can improve the fertilization rate in IVF-ET treatment. Material and methods: From July 1996 through April 2007, 32 cycles in 22 couples, who had previously exhibited oligoasthenozoospermia, were recruited in this study. The first ejaculate was obtained after 3-5 days following sexual ejaculate abstinence. The second ejaculate was obtained 30-60 min after the first one. Several parameters concerning sperm quality and fertilization rate in IVF were compared between the first and second ejaculation. Results: The mean duration between the first and second ejaculation was 34.2 min (mean ± SEM). The second ejaculate showed a significant reduction in the volume of ejaculate. The sperm motility (35.2±13.3) and motile sperm concentration (5.4±7.3) of the second ejaculate were significantly higher than those of the first (24.3±13.2 and 2.2±1.8, respectively; P<0.05). The fertilization rate of sperm from the second ejaculate (53.3%) was significantly higher than that from the first one (28.9%, P<0.05), but cleavage rates and embryo scores were similar. Conclusions: Therefore, this sequential ejaculation might be useful for treatment of male infertility at these hospital and clinics. %A Sugiyam, Rikikazu %A A. Al-Salem, Jawaher %A Nishi, Yayoi %A Sugiyama, Rie %A Shirai, Asako %A Inoue, Masato %A Irahara, Minoru %P 438-442 %9 journal article %U https://www.termedia.pl/Clinical-research-Improvement-of-sperm-motility-by-short-interval-sequential-ejaculation-in-oligoasthenozoospermic-patients,19,11759,1,1.html