Sentence examples for low sperm numbers from inspiring English sources

Due to the low sperm numbers collected by flushing, statistical analysis regarding motile spermatozoa was impossible.

Compared to rodents, the male human has relatively low sperm numbers and numbers of motile sperm with respect to that required for fertility [ 3].

Problems in the production and maturation of sperm are the most common causes of male infertility resulting in low sperm numbers, morphologically abnormal sperm or low sperm motility [ 1- 3].

In our study despite the low sperm numbers detected in oviduct flushing, viable sperm were found both 2 days and 4 days after ovulation with a maximum proportion of 60% motile spermatozoa (group 2) similar to the in vitro findings of England and Pacey (1998) [ 42] and Pacey et al. (2000) [ 43].

Any effect on fertility of low sperm number and a high proportion of failed copulations may be further exacerbated by the presence of an X-linked meiotic drive element [44].

In various species, including Drosophila, it is known that a low sperm number is a signal that influences females to perform a new copulation [ 38].

Male infertility comprising low sperm number (oligozoospermia), with loss of sperm motility (asthenozoospermia) is a common phenotype in humans, and has been reported, in specific populations, in individuals polymorphic for the CAG repeat at the POLG1 (mtDNA polymerase) locus (63, 64), or deriving from a specific mitochondrial haplogroup (65).

Use of AI-doses containing low-sperm numbers are increasingly been used to optimise use of elite bulls as well as to accommodate an eventual wider application of sex-sorted semen.

Early insemination results in low fertilization rates (low accessory sperm number), but good embryo quality, whereas, late insemination results in high fertilization rates (high accessory sperm number), but poor embryo quality.

Therefore, controlling for sperm numbers, a low-quality ejaculate might have a high probability of fertilising the first eggs relative to the last eggs of a laying sequence produced by a female, while we expect the high-quality ejaculate to become more competitive over subsequent days [ 23, 29].

Males in high competition treatment groups typically had 12%% larger testes, and 20%% higher epididymal sperm numbers and daily sperm production rates, compared to males in the low competition treatment groups.> -wrap-foot> > -wrap-foot> Mean (± s.e.m).m