The phrase "age of sperm" is correct and usable in written English.
It can be used in discussions related to fertility, reproductive health, or scientific studies involving male reproductive cells.
Example: "Research indicates that the age of sperm can impact the likelihood of genetic abnormalities in offspring."
Alternatives: "sperm age" or "sperm maturity".
The reasons why we observed conflicting results between species for the effect of age on sperm robustness remain unclear.
We consider this TMRCA to be younger than expected considering the age of the sperm whale lineage (divergence between the sperm whale and pygmy sperm whale 95% HPD: 17.6 27.9%/Ma) and the sperm whale's abundance and worldwide distribution (Best 1979; Whitehead 2002, 2003).
A chronological increasing trend with age of most sperm quantitative and qualitative traits (semen volume, sperm concentration, total sperm number per ejaculate, plasma membrane integrity, viability, acrosomal integrity and semen quality factor) was observed.
Objective: This study was undertaken to determine the effect of male aging on sperm quality as determined by semen analysis, the fertilization rate of human oocytes in vitro, and live birth rates.
This study was undertaken to determine effects of male aging on sperm parameters, fertilization, pregnancy, and live birth rates among in vitro fertilization (IVF) or gamete intrafallopian transfer (GIFT) couples.
Interestingly, there was a significant negative correlation between the male age and concentration of sperm, while we did not observe any correlation between the sperm head vacuoles and male factors such age, height, weight, and body mass index (Table 3).
Age, motility, log of sperm concentration, and specific gravity were included as continuous variables, and smoking as never, former, and current.
After approximately 8 days of age, the pool of sperm that are produced during larval development are depleted and few viable embryos are produced despite a continuous supply of oocytes.
The researchers varied the age of the labeled sperm by changing the number of days between injecting the tracer and mating the crickets.
The question then is whether the increased resemblance in LTL between DZ twins of older fathers relates in some way to the phenomenon of TL elongation with age in sperm of older men and the longer LTL in offspring of older fathers?
