Background It is estimated that approximately 8–12% of couples globally face problems
associated with infertility. A large number of men exhibit suboptimal sperm parameters …

Several studies have been reported on the occurrence of sperm motility inhibiting factors in
the male reproductive fluids of different mammalian species, but these proteins have not …

Sperm motility can be maintained in vitro by incubation in a defined medium under specific
conditions. In most studies, the exact role of various constituents of epididymal fluid …

Mature and potentially motile spermatozoa stored in cauda epididymis in an inactive state
for approximately 30 days; however, during ejaculation they regain motility. To understand …

Copper is essential for spermatogenesis and its presence has been demonstrated in male
and female reproductive fluids in several mammalian species. However, little is known about …

Sperm motility and concentration are commonly evaluated parameters in semen analysis.
Those parameters are assessed objectively with commercial instrumentation such as …

OBJECTIVE: To identify and characterize a novel sperm motility–stimulating protein (MSP)
from caprine serum. DESIGN: Prospective experimental study. SETTING: Research …

Dipeptidyl peptidase is a highly glycosylated serine protease with a broad tissue distribution.
In the present study, we investigated the alteration of the activity of dipeptidyl peptidase of …

众所周知受精是物种繁衍的重要一步. 不同于具有体内受精特性的物种, 很多海洋无脊椎生物
直接将精卵排放到自然水体中, 不具有复杂的交配行为, 不存在生物个体水平上的性选择(Sexual …

Mytilus edulis and M. trossulus coexist and form a natural hybrid zone along the Atlantic
Canada coast, which provides an excellent model to study marine invertebrate evolution …