Results 31 to 40 of about 47,453 (299)
Sperm limitation in the Delaware Bay blue crab population [PDF]
, 2023 Cohen, Jonathan H.Fisheries that selectively harvest based on sex and size have the potential to negatively impact the reproductive success of females in a population by causing reductions in sperm and seminal fluid transfer during mating.
Hoffman, Taylor
core +1 more source
A survey of 1700 women who formed their families using donor spermatozoa [PDF]
, 2013 This paper reports the results of an online survey of 1700 recipients of donor spermatozoa conducted by the Donor Sibling Registry, aiming to understand the perspectives of respondents who had used donor spermatozoa.
Sawyer, Neroli +4 more
core +1 more source
Journal of Urological Surgery, 2023 Objective:We investigated the effects of Coronavirus disease-2019 (COVID-19) vaccines on semen parameters in patients with idiopathic infertility who visited our urology clinic.Materials and Methods:Patients who visited our andrology clinic between ...
Eyüp Dil
doaj +1 more source
Experimental evolution of sperm count in protandrous self-fertilizing hermaphrodites [PDF]
, 2011 SUMMARYSperm count evolution is driven by sexual selection, with an added role of selection on gamete resource allocation for hermaphrodite spermatogenesis.
Rosalind L. Murray, Asher D. Cutter
core +1 more source
ogt-1 males transfer sperm less often and have reduced sperm count. [PDF]
, 2022 (A) Sperm competition tested by mating males with unc-39 hermaphrodites shows lower percent outcross progeny for ogt-1(jah01) males, as assessed by t-test.
Mesgana Dagnachew (14129650) +4 more
core +1 more source
Sperm count profile of men presenting for infertility evaluation in Nnewi Nigeria [PDF]
, 2007 Objectives: To determine the prevalence of sperm count abnormalities in men who presented at Nnamdi Azikiwe University Teaching Hospital (NAUTH) Nnewi for infertility management.
Maducuchi, J M +15 more
core +1 more source
Prague Medical Report, 2013 Metronidazole (MTZ) is a common antiparasitic and antibacterial drug. The drug and X-ray induced effects in mouse sperm count, sperm head abnormality and some oxidative stress parameters have been studied.
S. Singh, L. Das Roy, Sarbani Giri
doaj +1 more source
Environment International, 2021 Background: Essential elements such as iron (Fe), cobalt (Co), copper (Cu), zinc (Zn), selenium (Se), rubidium (Rb), strontium (Sr), and molybdenum (Mo) are necessary for reproductive health.
Heng-Gui Chen +9 more
doaj +1 more source
Sperm Counts Are Falling Worldwide
, 2021 Claims that sperm counts have fallen worldwide are based on meta-analysis of sperm concentration data taken from a variety of published studies that were never designed to answer this question. Since methods of counting sperm in the laboratory over time have changed so markedly, both in terms of the techniques used and in terms of the staff training ...
openaire +2 more sources
Relation of large and small RNA content per spermatozoon with total sperm count, sperm density and sperm motility modeled with a generalized additive model. [PDF]
, 2019 A) Large RNA content per sperm was inversely associated with total sperm count (p-value = 0.0003); B) Non-linear curvature relationship between small RNA per sperm content and total sperm count (non-linearity p-value = 0.037); C) Large RNA content per ...
Mark Sigman (218750) +7 more
core +1 more source