摘 要:
Objective
To understand the current semen quality status among Chinese young men
and influential factors in China and to explore its evaluation index.
Methods A total of 562 healthy male volunteers were recruited during
their premarital examinations in seven provincials and municipal
regions‘ MCH centers; descriptiveand principal component analyses were
used to analyze data.Results The findings show that semen volume
(2.61±1. 10 mL ), sperm density ( 64.47±34.59×10^6/mL), percentage of
sperm forward progression ( 59. 89%±17.11% ), percentage of sperm
viability ( 77.19%±11.87%), and percentage of normal sperm morphology
(78. 23%±9. 15% ). The first principal component function is Z1=-8.512
54+0.001 36X1‘+0. 031 92X2‘+0.043 52X3‘+ 0.039 84X4‘,which is closely
related to percentage of sperm viability (X3), percentage of sperm
forward progression (X2), and percentage of normal sperm morphology
(X4);The second principal component function is: Z2=0.491 92+ 0.080
80X1-0.000 58X2-0.005 1OX3-0.018 07X4, which depends on the total sperm
count (X1).Conclusion Only 42.3% subjects meet all the common WHO
standard of semen quality. The multiple analysis of Z1 showed that the
highest Z1 are among subjects from Guizhou, workers, or town residents.
Multiple analysis of Z2 showed that the older age when the subjects had
the first sexual impulse, the longer period of sexual abstinence and
more quantity of sperm they had ; the more sexual activity subjects
had, the less amount of sperm they had. (共9页) 