scholarly journals Relationship between human sperm-hyaluronan binding assay and fertilization rate in conventional in vitro fertilization

2006 ◽  
Vol 21 (6) ◽  
pp. 1545-1550 ◽  
Author(s):  
Hong Ye ◽  
Guo-ning Huang ◽  
Yang Gao ◽  
De Yi Liu
Keyword(s):  
In Vitro Fertilization ◽  
Binding Assay ◽  
Human Sperm ◽  
Fertilization Rate ◽  
Vitro Fertilization ◽  
Hyaluronan Binding

scholarly journals Clinical and Structural Features of Sperm Head Vacuoles in Men Included in the In Vitro Fertilization Programme

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Nina Fekonja ◽  
Jasna Štrus ◽  
Magda Tušek Žnidarič ◽  
Katja Knez ◽  
Eda Vrtacnik Bokal ◽  
...  
Keyword(s):  
In Vitro Fertilization ◽  
Sperm Morphology ◽  
Semen Quality ◽  
Sperm Concentration ◽  
Human Sperm ◽  
Structural Features ◽  
Fertilization Rate ◽  
Sperm Head ◽  
Vitro Fertilization

The human sperm head vacuoles and their role in male infertility are still poorly understood. The aim of this study was to identify the clinical and ultrastructural features of human sperm head vacuoles in men included in the in vitro fertilization programme: men with normal (normozoospermia) and impaired sperm morphology (teratozoospermia). The sperm samples were observed under 6000-time magnification using motile sperm organelle morphology examination (MSOME). The proportion of sperm with head vacuoles was evaluated and related to the outcome of in vitro fertilization. The sperm of men with impaired sperm morphology was characterized by a higher proportion of sperm head vacuoles. The sperm head vacuoles were related to impaired semen quality (sperm concentration, motility, and morphology) but were not influenced by male factors (semen volume, height, age, weight, or body mass index). Moreover, sperm head vacuoles were related to impaired fertilization rate merely after classical in vitro fertilization (IVF), while there was no relation to pregnancy. In a subgroup of men, the sperm was fixed and observed by transmission electron microscopy (TEM). The ultrastructural study revealed that sperm head vacuoles are large nuclear indentations of various sizes and positions, packed with membranous material organized in membrane whorls (MW).

Differential influence of recombinant non-glycosylated and glycosylated glycodelin on human sperm function: comparative studies with hamster spermatozoa

2001 ◽  
Vol 13 (3) ◽  
pp. 111 ◽  
Author(s):  
B. Dutta ◽  
R. Ain ◽  
P. B. Seshagiri ◽  
A. A. Karande
Keyword(s):  
In Vitro Fertilization ◽  
Acrosome Reaction ◽  
Human Sperm ◽  
Fertilization Rate ◽  
Sperm Function ◽  
Vitro Fertilization ◽  
Placental Protein 14 ◽  
Placental Protein

Glycodelin, also known as placental protein 14, has been implicated in endometriosis-related infertility. To determine the role of glycodelin and its glycosylated state, the influence of recombinant nonglycosylated-glycodelin (nongly-glycodelin) and glycosylated-glycodelin (gly-glycodelin) on human sperm function was evaluated. Whereas there was a significant (P<0.001) increase in the capacitation of nongly-glycodelin-treated spermatozoa compared with untreated controls (28.8 1.0% v. 21 1.5% respectively), treatment of spermatozoa with gly-glycodelin markedly (P<0.001) inhibited capacitation (10.7 0. 3%); acrosome reaction (AR) remained unaltered in all treatments. In a zona-free hamster egg penetration assay, the egg penetration index was higher (P<0.001) with nongly-glycodelin-treated spermatozoa (3.4 0.3) than with gly-glycodelin-treated spermatozoa (0.4 0.1) and untreated spermatozoa (1.6 0.2). A similar influence of glycodelin on capacitation was observed with hamster spermatozoa. However, the AR rate was higher (P<0. 01) in nongly-glycodelin-treated spermatozoa (39.4 1.6%) than in either gly-glycodelin-treated spermatozoa (19.3 2.0%) or untreated controls (30.0 1.2%). Moreover, the in vitro fertilization rate was significantly (P<0.01) higher with nongly-glycodelin treated-spermatozoa compared with untreated spermatozoa (77.5 2.3% v. 52.9 4.3%) and gly-glycodelin-treated spermatozoa (38.3 6.5%; P<0. 05). These results indicate that whereas nongly-glycodelin improves, gly-glycodelin inhibits, capacitation and fertilization potential of human and hamster spermatozoa, and that the glycosylation status of glycodelin determines its influence on sperm function.

scholarly journals A Brief Incubation of Cumulus-Enclosed Mouse Eggs in a Calcium-Free Medium Containing a High Concentration of Calcium-Chelator Markedly Improves Preimplantation Development

2020 ◽  
Vol 17 (10) ◽  
pp. 3505
Author(s):  
Valeria Merico ◽  
Silvia Garagna ◽  
Maurizio Zuccotti
Keyword(s):  
In Vitro Fertilization ◽  
Mammalian Species ◽  
Developmental Rate ◽  
Cumulus Cells ◽  
Fertilization Rate ◽  
Preimplantation Development ◽  
High Concentration ◽  
Vitro Fertilization ◽  
Positive Effects

The presence of cumulus cells (CCs) surrounding ovulated eggs is beneficial to in vitro fertilization and preimplantation development outcomes in several mammalian species. In the mouse, this contribution has a negligible effect on the fertilization rate; however, it is not yet clear whether it has positive effects on preimplantation development. Here, we compared the rates of in vitro fertilization and preimplantation development of ovulated B6C3F1 CC-enclosed vs. CC-free eggs, the latter obtained either after a 5 min treatment in M2 medium containing hyaluronidase or after 5–25 min in M2 medium supplemented with 34.2 mM EDTA (M2-EDTA). We found that, although the maintenance of CCs around ovulated eggs does not increment their developmental rate to blastocyst, the quality of the latter is significantly enhanced. Most importantly, for the first time, we describe a further quantitative and qualitative improvement, on preimplantation development, when CC-enclosed eggs are isolated from the oviducts in M2-EDTA and left in this medium for a total of 5 min prior to sperm insemination. Altogether, our results establish an important advancement in mouse IVF procedures that would be now interesting to test on other mammalian species.

scholarly journals Efficiency Comparison Between Dry And Humid Cultures For Clinical Outcome of The In Vitro Fertilization-Embryo Transfer

2021 ◽  
Author(s):  
Weihai Xu ◽  
Lin Zhang ◽  
Ling Zhang ◽  
Shishi Li ◽  
Jing Shu
Keyword(s):  
In Vitro Fertilization ◽  
Embryo Transfer ◽  
Implantation Rate ◽  
Fertilization Rate ◽  
Cleavage Rate ◽  
High Quality ◽  
Vitro Fertilization ◽  
Efficiency Comparison ◽  
Ivf Et

Abstract Background: In this study, we compared the in vitro embryo development, embryo transfer outcome and the offspring outcome in the in vitro fertilization-embryo transfer (IVF-ET) between dry culture (DC) and humid culture (HC). Methods: Our study was divided into two parts. Firstly, we determined the fertilization rate, cleavage rate and high-quality embryo rate from 21 cycles in the DC group (N=262 oocytes) and HC group (N=263 oocytes). Secondly, we determined the embryo transfer outcome and the offspring outcome in DC group (N=184 cycles) and HC group (N=136 cycles). Results: Compared with the HC group, significant increase was observed in the high-quality embryo rate (66.1.2% vs. 55.3%, p=0.037) and implantation rate (49.8% vs. 40.6%, p=0.027) in the DC group. No statistical differences were observed in the pregnant outcome and birth defect of the offspring (p>0.05). Compared with HC, DC was associated with a higher high-quality embryo rate and a higher implantation rate after embryo transfer. Conclusions: No statistical differences were noticed in the offspring conditions between the two culture modes. Taken together, DC may serve as a promising method for IVF-ET.

Sign in / Sign up

Export Citation Format

Share Document