Zhejiang Da Xue Xue Bao Yi Xue Ban
The Affiliated Obstetrics and Gynecology Hospital, College of Medical Sciences, Zhejiang University, Hangzhou 310006, China.
Published: June 2002
OBJECTIVE: To explore the influence of polyspermy on IVF outcomes in in vitro fertilization and embryo transfer(IVF-ET). METHODS: The data from 496 IVF-ET cycles and 5349 oocytes were analyzed retrospectively. A comparison of a number of fertility parameters with and without polyspermy was done. The fertility parameters were the number of oocytes retrieved, percentage of mature oocytes, fertilization rate, cleavage rate, occytes for ET, pregnancy rate. RESULTS: The percentage of mature occytes, fertilization rate, cleavage rate was 67.0 %,76.7 %and 95.6 %, respectively( P< 0.01). The pregnancy rate was higher in polyspermic fertilization cycles (25.7 %) than in cycles without polyspermy(23.6 %),but with no statistical significance ( P>0.05). CONCLUSION: Polyspermic fertilization is correlated with improved oocyte receptibility to sperm and could be considered as an encouraging sign for the success of IVF.
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http://dx.doi.org/10.3785/j.issn.1008-9292.2002.03.009 | DOI Listing |
BMJ Open
January 2025
Department of Reproductive Medicine, KK Women's and Children's Hospital, Singapore
Introduction: Despite the global prevalence of low fertility rates, male contributions to fertility and reproductive health outcomes have been understudied. This study aims to investigate the male contribution to fertility and explore the underlying biological mechanisms. Specifically, we aim to (1) identify male factors associated with successful pregnancy, (2) develop a fertility index incorporating modifiable factors for both males and females to predict pregnancy rate and (3) explore the relationship of male modifiable factors with semen parameters and molecular characteristics.
View Article and Find Full Text PDFBMC Vet Res
January 2025
Research Center for Pharmaceutical Nanotechnology, Tabriz University of Medical Sciences, Tabriz, Iran.
Background: In the cryopreservation process, rooster spermatozoa are vastly sensitive to reactive oxygen species (ROS). This study aimed to investigate the effects of Lake extender supplemented via Cysteamine (CYS) on the quality and fertility characteristics of rooster semen during the cryopreservation process.
Methods: Semen samples were collected from 10 proved Ross-308 roosters, diluted and cryopreserved in the Lake extender which contained 0, 1, 2, 4, and 8 mM of CYS (C-0, C-1, C-2, C-4, and C-8, respectively).
Domest Anim Endocrinol
January 2025
USDA, ARS, U.S. Meat Animal Research Center, Clay Center, NE, USA.
The scientific discipline of endocrinology has been invaluable to our understanding of the estrous cycle. In the second half of the twentieth century the development of immunoassay technologies provided a rapid and sensitive method to quantify circulating concentrations of reproductive hormones and relate them to stage of the estrous cycle and physiological status of the animal. Ovarian ultrasonography provided the ability to track the growth and regression of ovarian structures within the same animal across the estrous cycle in real time and, in combination with hormonal profiling, accurately identify mechanisms regulating the estrous cycle and early pregnancy.
View Article and Find Full Text PDFVet Res Forum
December 2024
Department of Basic Sciences, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran.
Testicular ischemia-reperfusion (I/R) injury during testicular torsion is strongly influenced by oxidative stress caused by excessive accumulation of unscavenged reactive oxygen species. This study aimed to investigate the effects of intra-peritoneal administration of Mito-TEMPO (MT) on I/R injury in testicular torsion/detorsion (T/D) in mice. Forty-two male mice were divided into seven groups including 1 control and 6 treatment groups (360° T/D, 720° T/D, 360° T/D + 0.
View Article and Find Full Text PDFHeliyon
January 2025
Agronomy Section, Faculty of Agriculture, Khon Kaen University, Khon Kaen, Thailand.
To achieve good agricultural practices and maximize the economic yield of corn, farmers should reduce the use of inorganic fertilizers. A field experiment was conducted in the Chonnabot district, Khon Kaen province, Thailand, during the 2022 and 2023 growing seasons. The aim was to assess the impact of different organic fertilizers and their combinations on the growth and yield of commercial sweet corn ( L.
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