Schwartz D, Mayaux M J, Spira A, Moscato M L, Jouannet P, Czyglik F, David G
Fertil Steril. 1983 Apr;39(4):530-5. doi: 10.1016/s0015-0282(16)46946-3.
The relationship between age and semen characteristics has been studied; any effect due to the influence of the length of abstinence preceding ejaculation was eliminated. There is an improvement in semen characteristics up to 25 years of age, followed by a leveling off and a subsequent decrease. This variation is not significant as far as the sperm count, semen volume, and the total number of spermatozoa are concerned. The variation, although small, is highly significant for the morphologic characteristics and prefreeze and postthaw motility. The values for the older subjects were significantly lower for postthaw motility in the group 36 to 40 years of age, in the group 41 to 45 years of age for morphologic normality, and in the group 46 to 50 years of age for prefreeze motility. The lower values in the group 21 to 25 years of age are particularly noticeable with regard to morphologic characteristics. The same curve is encountered in the variation with age of each abnormal form, but the most marked variation is found in the increased percentage of coiled tails, which first appears in the group 36 to 40 years of age.
年龄与精液特征之间的关系已得到研究；射精前禁欲时间的影响所导致的任何效应均已消除。精液特征在25岁之前有所改善，随后趋于平稳，继而下降。就精子计数、精液量和精子总数而言，这种变化并不显著。尽管这种变化很小，但对于形态特征以及冻融前和冻融后的活力而言，却具有高度显著性。在36至40岁组中，解冻后活力方面老年受试者的值显著较低；在41至45岁组中，形态正常方面的值显著较低；在46至50岁组中，冻融前活力方面的值显著较低。在21至25岁组中，形态特征方面的较低值尤为明显。每种异常形态随年龄的变化呈现相同的曲线，但盘绕尾百分比增加的变化最为显著，其首先出现在36至40岁组中。
