Results 61 to 70 of about 17,404 (221)

Hyperactivation and Tyrosine Phosphorylation of Cryopreserved Stallion Spermatozoa in Relation to Conventional In Vitro Fertilization Blastocyst Production

Andrology, EarlyView.
ABSTRACT Background Challenges in establishing clinical conventional in vitro fertilization (IVF) in horses include variation in sperm and oocyte quality, which can be affected by mare age. Extended preincubation of stallion spermatozoa has resulted in successful IVF.
Raul A. Gonzalez‐Castro, Carolina C. Porflidt, Alexandra L. Ash, Jacobo S. Rodriguez, Perla D. Fleury, Edward L. Squires, Elaine M. Carnevale   +6 more
wiley   +1 more source

The development of contraceptive vaccines [PDF]

, 2002
The use of vaccination as a means of controlling fertility was established during the last decade with the publication of a successful Phase II trial demonstrating the efficacy of this approach to family planning.
Delves, PJ
core  

Herstellung, Charakterisierung und Einsatz von anti-Zona pellucida Protein 3 Peptidantiseren [PDF]

, 1999
Zielstellung dieser Arbeit war die Herstellung von polyklonalen Antikörpern gegen synthetische Peptide des Zona pellucida 3 Proteins. Aus den veröffentlichten ZP3- Aminosäuresequenzen der Maus, des Menschen und des Hamsters wurden verschiedene ...
Pfisterer, Susanne Charlotte Martha
core   +2 more sources

Evaluation of Sugar Residues in Zona Pellucida During Ovarian Cycle

پزشکی بالینی ابن سینا, 2003
Glycoconjugates, particulary their sugar side chains, play important roles in development. This investigation was undertaken to examine the chemical nature of components in the zona pellucida possibly related to follicular development.           In this
Mohammad Barbarestani, Seyyed Mohammad Hosseinipanah, Ali Reza Fazel, Mehran Rezei Habibi, Mostafa Hoseini, Mohammad Akbari, Farid Abolhasani, Mir Abbas Mir Abdolvahabi   +7 more
doaj  

Crossing the barrier or how regulation of ovastacin controls fertilization and translates into clinical phenotypes

iScience
Summary: The zona pellucida, a glycoprotein matrix enveloping the mammalian egg, exerts essential functions during fertilization and early embryonic development. Its safeguard property regulates sperm entry and thus indirectly controls fertility. Limited
Nele von Wiegen, Christian Behl, Hagen Körschgen   +2 more
doaj   +1 more source

Establishment of Human Formative Pluripotent Stem Cell‐Like Cells Exhibiting Amniotic Differentiation Potentials

Cell Proliferation, EarlyView.
The hfPSC‐LCs could be established from naïve hESCs, conventional hESCs, hiPSCs, and human blastocysts. The hfPSC‐LCs hold robust capacity for three germ layers, hPGCLCs, and hALPCs. ABSTRACT Human embryos undergo pivotal morphogenetic remodelling shortly after implantation. The understanding of this crucial stage is severely impeded by the scarcity of
Xiaoxiao Wang, Qizhi Wang, Yu Wu, Chen Gu, Mingfei Li, Yong Fan, Xiangjin Kang, Lei Li, Zheng Gao, Mingyan Hei, Jianqiao Liu, Lei Li   +11 more
wiley   +1 more source

Human Blastocyst's Zona Pellucida segmentation via boosting ensemble of complementary learning

Informatics in Medicine Unlocked, 2018
Characteristics of Zona Pellucida (ZP), particularly its thickness, is a key indicator of human blastocyst (day-5 embryo) quality. Therefore, ZP segmentation is an important step towards achieving automatic embryo quality assessment.
Reza Moradi Rad, Parvaneh Saeedi, Jason Au, Jon Havelock   +3 more
doaj   +1 more source

Characterization of human zona pellucida glycoproteins [PDF]

Molecular Human Reproduction, 1999
The human egg may only be fertilized by one spermatozoon to prevent polyploidy. In most mammals, the primary block to polyspermy occurs at the zona pellucida (ZP). Little is known of the human ZP and the changes occurring following fertilization to prevent polyploidy. Using antibodies directed against synthetic peptides predicted from the human ZP2 and
Bauskin A.R., Franken D.R., Eberspaecher U., Donner P.   +3 more
openaire   +3 more sources

Informing elephant management through demographic snapshots

Conservation Science and Practice, EarlyView.
Understanding demography is vital for managing species successfully; however, for elephants, traditional surveys are both costly and labor‐intensive. This study presents a cost‐effective method for estimating age structures of savannah elephants in southern Africa, revealing how water provisioning, density dependence, and fertility control influence ...
Ryan M. Huang, Stuart L. Pimm, Cornelius J. Louw, Robert A. R. Guldemond   +3 more
wiley   +1 more source

Expression pattern of glycoconjugates in the Bidderian and ovarian follicles of the Brazilian toad Bufo ictericus analyzed by lectin histochemistry

Brazilian Journal of Biology
The Bidder's organ and ovary of the Brazilian toad Bufo ictericus were studied by light microscopy, using hematoxylin-eosin (HE) and periodic acid Schiff (PAS) staining.
C. F. Farias, R. A. Azevedo, L. Brito-Gitirana   +2 more
doaj   +1 more source