Results 71 to 80 of about 29,818 (258)
Scientia Marina, 2002 European sea bass (Dicentrarchus labrax L.) is a species with group-synchronous ovarian development. A mechanism is required which enables maturation to occur in the first clutches of oocytes without inducing maturation in subsequent clutches.
Juan F. Asturiano +5 more
doaj +1 more source
Regulation of reproduction via tight control of gonadotropin hormone levels. [PDF]
, 2018 Mammalian reproduction is controlled by the hypothalamic-pituitary-gonadal axis. GnRH from the hypothalamus regulates synthesis and secretion of gonadotropins, LH and FSH, which then control steroidogenesis and gametogenesis. In females, serum LH and FSH
Coss, Djurdjica
core +1 more source
A preclinical mouse model mimicking the ovarian cancer‐induced estrogen deficiency‐depression axis
Animal Models and Experimental Medicine, EarlyView.A preclinical mouse model of ovarian cancer–related depression was developed by combining intraperitoneal tumor cell injection, ovariectomy, and chronic restraint stress. The model replicates key clinical features including estrogen deficiency, depressive‐like behaviors, and tumor progression, and provides a reliable tool for studying the endocrine ...
Jiamin Liu +6 more
wiley +1 more source
Effects of endocrine-disrupting chemical exposure on zebrafish ovarian follicles [PDF]
, 2017 The process of oocyte maturation involves both nuclear and cytoplasmic events that are essential for the production of viable eggs and subsequent fertilization in sexually reproducing animals.
D\u27Angelo, Josephine +1 more
core +2 more sources
The Anatomical Record, EarlyView.Abstract The anatomical description of the hourglass dolphin (Cephalorhynchus cruciger) and the spectacled porpoise (Phocoena dioptrica) remains largely unexplored, due to limited specimen availability and preservation challenges. This study employed digital imaging techniques, conventional histology, and computed tomography to provide visualization of
Jean‐Marie Graïc +26 more
wiley +1 more source
Haemoglobin polymorphism inGadus morhua: Genotypic differences in maturing age and within-season gonad maturation [PDF]
Helgoländer Meeresuntersuchungen, 1983 276 specimens of Atlantic cod (Gadus morhua L.) were caught during spawning in a restricted area of the Trondheimsfjord, Norway, in April and May 1979. Genotypes at the polymorphic haemoglobin locusHbl differed significantly with respect to mean age at maturation (in males) and mean gonadic development stage (in females).
J. Mork, R. Giskeödegård, G. Sundnes
openaire +1 more source
Gonadal development in scorpion mud‐turtles, Kinosternon scorpioides, in a controlled environment
The Anatomical Record, EarlyView.Stage 20 was identified as the critical point for gonadal differentiation in Kinosternon scorpioides, providing key insights into sex determination. These findings enhance conservation strategies by supporting reproductive management and population viability in both in situ and ex situ programs. Abstract Research on gonadal development including sexual
Brenda Braga +4 more
wiley +1 more source
Majallah-i ̒Ilmī-i Shīlāt-i Īrān, 1998 In this study, the stage of gonadal development, type and season of spawning of Otolithes ruber in the North West of Persian Gulf were identified. O.ruber maturation and spawning were studied by macroscopic, microscopic, and histologic observation of ...
Gh. Eskandari; S. Amirinia; A. Savari; V. Yavari
doaj
Novas perspectivas no diagnóstico do hipogonadismo pediátrico masculino: a importância do AMH como marcador de células de Sertoli [PDF]
, 2011 Sertoli cells are the most active cell population in the testis during infancy and childhood. In these periods of life, hypogonadism can only be evidenced without stimulation tests, if Sertoli cell function is assessed.
Grinspon, Romina, Rey, Rodolfo Alberto
core +2 more sources
The Anatomical Record, EarlyView.Abstract The equine ovary exhibits unique structural and developmental features that distinguish it from those of other domestic species, including the presence of an ovulation fossa and an inversion of cortical and medullary layers. This study aimed to investigate the morphostructural development of the equine fetal ovary, with particular emphasis on ...
Laura Ver Goltz +5 more
wiley +1 more source