نتایج جستجو برای: fertilization ability

تعداد نتایج: 449509  

Journal: :Biology of reproduction 2013
Sarah D Cochran John B Cole Daniel J Null Peter J Hansen

Fertilization and development of the preimplantation embryo is under genetic control. The present goal was to test 434 single nucleotide polymorphisms (SNPs) for association with genetic variation in fertilization and early embryonic development. The approach was to produce embryos from 93 bulls using in vitro procedures (n = 3-6 replicates per bull) and relate cleavage rate (CR) and developmen...

Journal: :Current Biology 2015
Luke M. Noble Audrey S. Chang Daniel McNelis Max Kramer Mimi Yen Jasmine P. Nicodemus David D. Riccardi Patrick Ammerman Matthew Phillips Tangirul Islam Matthew V. Rockman

In sexual species, gametes have to find and recognize one another. Signaling is thus central to sexual reproduction and involves a rapidly evolving interplay of shared and divergent interests [1-4]. Among Caenorhabditis nematodes, three species have evolved self-fertilization, changing the balance of intersexual relations [5]. Males in these androdioecious species are rare, and the evolutionary...

2012
Xue-Feng Huang Yan Li Yi-Hua Gu Miao Liu Yan Xu Yao Yuan Fei Sun Hui-Qin Zhang Hui-Juan Shi

The present study was undertaken to determine the reproductive hazards of Di-(2-ethylhexyl)-phthalate (DEHP) on mouse spermatozoa and embryos in vitro and genomic changes in vivo. Direct low-level DEHP exposure (1 μg/ml) on spermatozoa and embryos was investigated by in vitro fertilization (IVF) process, culture of preimplanted embryos in DEHP-supplemented medium and embryo transfer to achieve ...

Journal: :Human reproduction 1998
H Shibahara M Mitsuo M Inoue A Hasegawa M Shigeta K Koyama

The zona-free hamster egg penetration test (HEPT) is widely used for evaluating the fertilizing ability of human spermatozoa. However, the relationship between the HEPT and microassisted fertilization has yet to be determined. To evaluate the efficiency of HEPT in selecting the most appropriate method of in-vitro fertilization (IVF), including intracytoplasmic sperm injection (ICSI) in couples ...

2013
Hongwei Nan Qing Liu Jinsong Chen Xinying Cheng Huajun Yin Chunying Yin Chunzhang Zhao

BACKGROUND We have limited understanding of root foraging responses when plants were simultaneously exposed to nutrient heterogeneity and competition, and our goal was to determine whether and how plants integrate information about nutrients and neighbors in root foraging processes. METHODOLOGY/PRINCIPAL FINDINGS The experiment was conducted in split-containers, wherein half of the roots of s...

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