Although some specific information exists on the reproductive events in camel 4–6 our present knowledge of the hormonal changes in the camel fetus is very scarce. Therefore, the present study was carried out to determine the ovarian, adrenal and plasma pregnenolone and 17α-hydroxypregnenolone ...
The cochlear ganglion was investigated in serially sectioned human embryos at developmental stages 18 and 19 (44-46 postovulatory days). During this period the cochlear ganglion is separated from the vestibular ganglion, and it is adjacent to the cochlear duct. In embryos of investigated stages fi...
Therefore, this study aims to explore the developmental timing of the ALNA in Bactrian camels and its changes in anatomical and histological structures at different stages of embryonic development. The following indicators were specifically studied and observed: the timing and location of the appearance...
In 1923, Painter reported that there were 48 chromosomes in the normal human cell. The correct number of 46 was established in 1956 by Tijo and Levan.9In 1956, Down syndrome, Turner syndrome, and Klinefelter syndrome were shown to be the result of chromosomal anomalies. Porter10...
Initial testing efforts for improved toxicity testing focused on the use of whole-embryo systems, and these have become valuable tools for assessing toxicity at late embryonic stages [151]. The use of differentiating stem cells provides the possibility of increasing assay-throughput and allows ...
This chapter is a synopsis and presents brief descriptions of the placenta and membranes throughout the stages of development. Embryological data concerning the embryo and fetus are given only insofar as they are of importance for the definition of the stage. It is not the intention of this ...
HSCs from all stages of development express the same levels of Kit on the cell surface regardless of their cycling status or position in the cell cycle.68,83–85 However, several lines of evidence point to differences in the requirements and responsiveness of fetal and adult HSCs to SF stimula...
To investigate gene expression of transforming growth factor-beta (TGF-β)_1, TGF-β_3, and their receptors (TBR Ⅰ and TBR Ⅱ) in fetal skin at different developmental stages. Skin specimens were ob tained from human fetuses of spontaneous abortion at different gestational ages and postnatal ...
An atlas of developmental stages, 2nd edn. Wiley, New York Google Scholar O’Rourke NA, Chenn A, McConnell SK (1997) Postmitotic neurons migrate tangentially in the cortical ventricular zone. Development 124:997–1005 PubMed Google Scholar Oba H, Barkovich AJ (1995) Holoprosencephaly: an ...
A. Generation and long-term culture of advanced cerebral organoids for studying later stages of neural development. Nat. Protoc. 16, 579–602 (2021). CAS PubMed Google Scholar He, Y. et al. The EED protein–protein interaction inhibitor A-395 inactivates the PRC2 complex. Nat. Chem. ...