Results 261 to 270 of about 209,877 (288)

Genetics of polarity in mammalian embryos

Reproductive BioMedicine Online, 2005
This brief review is devoted to the genetic control of polarity and embryonic axes in preimplantation mammalian embryos. Discussion is related to their formation, the considerable variations in gene activity in these early phases of development, and the influence of timers over polarities and related aspects of development.
openaire   +2 more sources

Erythropoiesis in the mammalian embryo

Experimental Hematology
Red blood cells (RBCs) comprise a critical component of the cardiovascular network, which constitutes the first functional organ system of the developing mammalian embryo. Examination of circulating blood cells in mammalian embryos revealed two distinct types of erythroid cells: large, nucleated "primitive" erythroblasts followed by smaller, enucleated
openaire   +2 more sources

Identification of Sex in Mammalian Embryos

1986
One of the uncertainties in reproduction of farm animals, regardless of whether one considers natural reproduction or reproduction assisted by artificial insemination or embryo transfer, is sex of the resulting off spring. This uncertainty can be of significant consequence when the economic value of one sex is considerably greater than that of the ...
openaire   +2 more sources

Cryopreservation of Mammalian Eggs and Embryos

1986
In the decade since reliable methods of freezing mouse embryos were first described (Whittingham et al., 1972; Wilmut, 1972a) methods have been developed for freezing the embryos of a number of other species. Frozen embryos have been used in the treatment of human infertility, in farm animal breeding, and in biological research. During this period, the
openaire   +2 more sources

Apoptosis in Mammalian Embryos

2002
The preimplantation development of eutherian mammals is remarkably similar, spanning cleavage of the fertilized ovum; compaction and morula formation; and finally cavitation, with the formation of a blastocyst. Blastocyst formation marks the differentiation of the epithelial trophectoderm (TE), which is specialized for implantation, and the ...
Kate Hardy, Sophie Spanos
openaire   +1 more source

Cryobiology: Preservation of Mammalian Embryos

1986
The preservation of mammalian embryos has become a routine procedure. Thousands of live offspring have been produced from frozen-thawed embryos transferred into recipient foster mothers. Species whose embryos have been successfully preserved include mouse, rat, rabbit, sheep, goat, cattle, horse, antelope, baboon, and human.
openaire   +2 more sources

Cryopreservation of Mammalian Embryos

1988
Early investigations of the effects of cooling and rewarming cells employed both spermatozoa and ova as experimental material. Spermatozoa were selected because of the ease of collection, inherent motility, and small size. Oocytes were employed mainly for their large size which allowed direct morphological observations.
Frank B. Kuzan, Patrick Quinn
openaire   +1 more source

IMMUNISATION OF THE MAMMALIAN EMBRYO

The Lancet, 1947
F W R, BRAMBELL, W A, HEMMINGS, W T, ROWLANDS   +2 more
openaire   +2 more sources

Encapsulation of Mammalian Embryos

1999
Encapsulation of mammalian preimplantation embryos has its origins in the work of Willadsen in the late 1970s and in the need to develop an artificial zona pellucida for denuded sheep, horse, and cattle embryos used in the production of monozygotic twins for the livestock industry.
Glen K. Adaniya, Richard G. Rawlins
openaire   +1 more source

The in vitro culture of mammalian embryos

Nature Methods, 2023
Xulun Wu, Jinglei Zhai, Qian Li, Hongmei Wang   +3 more
openaire   +2 more sources