Results 41 to 50 of about 60,572 (313)
Action of the Metalloproteinases in Gonadal Remodeling during Sex Reversal in the Sequential Hermaphroditism of the Teleostei Fish Synbranchus marmoratus (Synbranchiformes: Synbranchidae) [PDF]
, 2018 Teleostei present great plasticity regarding sex change. During sex reversal, the whole gonadincluding the germinal epithelium undergoes significant changes, remodeling, and neoformation.However, there is no information on the changes that occur within ...
Antoneli, Fernanda +3 more
core +2 more sources
BMC Bioinformatics, 2019 Background The maturation of the female germ cell, the oocyte, requires the synthesis and storing of all the necessary metabolites to support multiple divisions after fertilization.
Beatriz Peñalver Bernabé +7 more
doaj +1 more source
Female reproductive decline is determined by remaining ovarian reserve and age. [PDF]
PLoS ONE, 2014 The early decline and loss of female fertility in humans and other species represents an evolutionary paradox. Despite being born with a vast stock of oocytes, females encounter an exhaustion of ovarian reserve and sterility half way through their ...
Pawel Wilkosz +3 more
doaj +1 more source
, 2013 The size of mature oocytes is similar across mammalian species, yet the size of ovarian follicles increases with species size, with some ovarian follicles reaching diameters more than 1000-fold the size of the enclosed oocyte.
Bächler, M. +3 more
core +1 more source
Peptide Regulators in the Ovarian Follicle [PDF]
Australian Journal of Biological Sciences, 1981 Data generated within the last several years have shown that follicular fluid contains substances, presumably peptide in nature, which exert potentially important effects on granulosa cells and the oocyte. This review briefly summarizes the current evidence concerning the nature and importance of these putative regulators including the luteinization ...
openaire +3 more sources
Jurnal Sain Veteriner, 2015 The study aimed to determine the accuracy of ovarian follicle and corpus luteum measurements in vivo using ultrasonography diagnostic and in vitro after slicing of the ovaries.
Prabowo Purwono Putro
doaj +1 more source
Foliculogénesis Ovárica en la Raya Marmorada, Sympterygia bonapartii (Müller & Henle, 1841) (Chondrichthyes, Rajidae) [PDF]
, 2011 Los Condrictios se han convertido en un recurso económico importante en las últimas décadas, siendo Argentina uno de los países que más explota tiburones y rayas, incluso a niveles que exceden los límites de varias especies.
Díaz Andrade, María Constanza +3 more
core +1 more source
Ovarian follicle burnout: A universal phenomenon? [PDF]
Cell Cycle, 2013 The ovarian follicle reserve is maintained in a delicate state of homeostasis aimed at preserving the majority of follicles in a dormant state. Key regulatory factors in follicle activation and quiescence include the PI3K/PTEN/Akt signaling pathway in the oocyte, as well as external paracrine inhibitory factors such as anti-Mullerian hormone (AMH) (Fig.
Zohar Gavish +3 more
openaire +3 more sources
مجلة كلية الطب, 2011 Background: Polycystic ovary syndrome is the most common cause of anovulation, and the number of antral follicles is of great importance in determining ovarian reserve, so identification of patients with diminished ovarian reserve help in choosing ...
Hanan L. Sudek
doaj +1 more source
Short oestrous cycles in sheep during anoestrus involve defects in progesterone biosynthesis and luteal neovascularisation [PDF]
, 2014 Anoestrous ewes can be induced to ovulate by the socio-sexual, 'ram effect'. However, in some ewes the induced ovulation is followed by an abnormally short luteal phase causing a so called, "short cycle".
Acritopoulou +28 more
core +3 more sources