Sentence examples for sperm levels from inspiring English sources

A study among sperm donors in France calculated that healthy sperm levels were dropping by 2% every single year.

It found an increasingly idle lifestyle might be a contributing factor to declining sperm levels.

In a pilot study, men using the gels for just a few weeks saw drastically reduced sperm levels, which returned to normal quickly after the gels were discontinued.

It also found that wearing boxer shorts rather than tighter underwear was linked to higher sperm levels.

Moreover, there has been a sharp rise in information, much of it developed through fertility research, about how low sperm levels need to be for a man to be infertile.

Chinese herbalism has been credited anecdotally with increases in male sperm levels, while cranial osteopaths work on a woman's skull and pelvis, looking for problems with the natural rhythm of the spinal fluid so as to correct the energy flow.

Men have evolved "to defend at the sperm level against their mates' having another lover in the same fertile period -- not many others, but one or two," Alison Jolly, a Princeton primatologist, wrote in her 1999 book "Lucy's Legacy" (Harvard University Press).

At the single sperm level the presence of vacuoles or morphological abnormalities did not correlate with epigenetic abnormalities.

Even though not acting on the sperm level in a strict sense, sequential ejaculation may bring up time as a load of the raffle for fertilization.

In addition, our study also found that sperm competition levels are also associated to the degree of elongation of the sperm head, a trait which has received little attention despite the major role it could play in sperm hydrodynamics.

To evaluate sperm quality, levels of markers of epididymal and accessory gland function, and T in semen from men grouped according to their body mass index (BMI).