Sentence examples for performance of sperm from inspiring English sources

A necessary next step therefore is to test the performance of sperm groups of different rodent species including the Norway rat and the house mouse in viscous media and in situ.

While there is comparative and experimental evidence consistent with this expectation [reviewed in [ 45]], recent work indicates that in addition to the number of sperm inseminated, the motile performance of sperm can also play a critical role in sperm competition [ 14- 16, 42].

To assess individual chances for a live-born child in azoospermic men by performance of testicular sperm extraction (TESE) followed by intracytoplasmatic sperm injection (ICSI).

Therefore, our study suggests that an increment in the metabolic performance of the sperm produced may be an efficient – and often neglected – evolutionary response to sperm competition that can complement or supplement an increase in sperm numbers.

Objective: To determine whether the performance of intracytoplasmic sperm injection (ICSI) in cases of unexplained infertility and of borderline semen parameters can prevent fertilization failure.

While the function of oligopyrene sperm remains unknown, it is clear that these data cannot be taken as evidence for a functional relationship between the length and performance of fertilizing sperm.

Although, a selection based on the energetic performance of the sperm is not expected to influence the transmission of mtDNA variants directly (because of the maternal inheritance of mtDNA), it still might have an indirect effect through the selection pressure on nuclear genes relevant for mitochondrial function.

Our findings of functional equivalence in the performance of farm salmon sperm and eggs under a range of tests add to concerns about the ability of farm Atlantic salmon to introgress wild populations, especially if the compromised breeding behaviour of farm fish straight from captivity can be improved by a period of readjustment in the wild before spawning.

The mechanism by which males make strategic adjustments in sperm quality is unknown, but recent work on fowl suggests that adjustments in seminal fluid quality may be an important modulator of sperm performance [13].

Second, we compared the performance in sperm competition of the two types of males and addressed the issue of sperm incapacitation and sperm release by a double mating experiment in which the second male transferred only seminal fluid.

Here, we undertook a mechanistic investigation of sperm swimming performance in the coastal polychaete Arenicola marina during an extended exposure to OA conditions (pHNBS 7.77, 1000 μatm pCO2).