Results 71 to 80 of about 14,838,419 (252)

Conditional strategies to study gene function during gonadal development in mammals. [PDF]

, 2008
Sexual development in mammals involves a complex cascade of genetic events. These begin with a cell fate decision, whether to make Sertoli or follicle cells, that gives rise to the development of a male or female gonad, which is controlled by the testis ...
Tye, A.J.
core  

IDB Newsletter: Vol. 6, no. 4, October 1968

, 1968
IDB Newsletter is a monthly publication of the Inter-American Development that reports on the activities of the Inter-American Development Bank and appears in English and Spanish ...
Inter-American Development Bank
core   +1 more source

Determining the timeline of gonadal and genital differentiation in male and female equine fetuses allows for early detection and intervention in malformations

The Anatomical Record, EarlyView.
Abstract Sexual differentiation in the equine fetus involves coordinated morphogenetic processes that shape both the gonads and the genital ducts. Although the formation of testes and ovaries has been relatively well documented, the temporal dynamics and morphometric patterns of the mesonephric (Wolffian) and paramesonephric (Müllerian) ducts remain ...
Tais Harumi de Castro Sasahara, Silvio Pires Gomes, Fabio Cesar Magioli Abdala, Bruno Cesar Schimming, Maria Angelica Miglino   +4 more
wiley   +1 more source

Functional Spermatogenesis Across Testicular Developmental Stages in Neomale Large Yellow Croaker (Larimichthys crocea) Revealed by Histology and Gonadal Specific Cellular Markers

Biology
Gonadal development and spermatogenesis critically influence fish reproductive performance. Neomales (genetically female but functionally male) are indispensable for generating all-female populations, yet their spermatogenesis remains understudied.
Xu Liu, Weihua Hu, Ruiyi Chen, Yang Yang, Sixian Yang, Dongdong Xu   +5 more
doaj   +1 more source

IDB Newsletter: Vol. 8, no. 4, October 1970

, 1970
IDB Newsletter is a monthly publication of the Inter-American Development that reports on the activities of the Inter-American Development Bank and appears in English and Spanish ...
Inter-American Development Bank
core   +1 more source

Cortical bone distribution in the human mandibular symphysis: Ontogenic and morphometric approaches in archeological context

The Anatomical Record, EarlyView.
Abstract The human mandibular symphysis concentrates multiaxial loads during function and remodels throughout growth, but the precise mechanisms underlying cortical bone shape during growth remain relatively unexplored. Approaches based solely on thickness or external cortical contours provide only partial insights and do not capture the functional ...
Ana Ribeiro, Elsa Garot, Christine Couture, Pierre‐Hadrien Decaup   +3 more
wiley   +1 more source

Much more than their fangs: Macroscopic anatomy of the brain of Bothrops moojeni Hoge 1966 (Squamata, Serpentes, Viperidae)

The Anatomical Record, EarlyView.
Abstract Neuroanatomical research has progressed considerably in several vertebrate lineages, yet studies of reptilian brain morphology remain markedly underdeveloped. Here we provide the first description of macroscopic brain anatomy and its ontogeny in the viperid Bothrops moojeni, based on a sample of seven individuals.
Paula Araújo, Júlio César Costa de Souza, Angele Martins   +2 more
wiley   +1 more source

Endoscopy as a new method for sex determination in Siberian sturgeon (Acipenser baerii) [PDF]

بوم‌شناسی آبزیان, 2015
Determination of sex and gonadal development of Siberian sturgeon (Acipenser baerii) by using endoscopy as a new and less aggressive method for sturgeon conservation is the aim of this study.
Najmeh Abbasi, Ahmad Noori, Bita Kalvani Neitali, Mohammad Hossein Tolouei Gilani   +3 more
doaj  

Male reproductive system in stenopodidean shrimps: Unveiling basal reproductive traits in shrimp‐like Pleocyemata (Stenopodidae and Spongicolidae)

The Anatomical Record, EarlyView.
Abstract Stenopodidea represents one of the basal lineages within Pleocyemata, yet the male reproductive system (MRS) of this group remains poorly understood, with limited information available regarding its morphology and function. This study provides the first detailed description of the MRS in four stenopodidean shrimp species from two families ...
Caio Santos Nogueira, Lucas Rezende Penido Paschoal, Fernando José Zara   +2 more
wiley   +1 more source

IDB Newsletter: Vol. 6, no. 1, January 1968

, 1968
IDB Newsletter is a monthly publication of the Inter-American Development that reports on the activities of the Inter-American Development Bank and appears in English and Spanish ...
Inter-American Development Bank
core   +1 more source