Results 21 to 30 of about 4,165,700 (341)
Minireview: Sex Differentiation [PDF]
Endocrinology, 2001 Mammalian sex differentiation is a hormone-dependent process in the male following the determination of a testis from the indifferent gonad through a cascade of genetic events. Female sex differentiation is not dependent on ovarian hormones, yet there is evidence that members of the Wnt family of developmental signaling molecules play a role in ...
openaire +2 more sources
Sexing of Embryos at the Time of Twin Reduction: A Clinical Approach
Animals, 2023 This study provides new unique information on bovine twin pairs during the late embryonic period (28–34 days of pregnancy) in relation to (1) a predictive ultrasound measurement that was differential for sexing heterosexual twins; (2) intrauterine ...
Fernando López-Gatius +1 more
doaj +1 more source
Sex determination in mythology and history [PDF]
, 2005 The history of ideas on how the sexes became divided spans at least three thousand years. The biblical account of the origin of Eve, and the opinions of the philosophers of classical Greece, have unexpected bearings on present-day ideas.
Mittwoch, U
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Female Sex Development and Reproductive Duct Formation Depend on Wnt4a in Zebrafish. [PDF]
, 2019 In laboratory strains of zebrafish, sex determination occurs in the absence of a typical sex chromosome and it is not known what regulates the proportion of animals that develop as males or females.
Bruce W. Draper +8 more
core +1 more source
Sex steroid dynamics during embryogenesis and sexual differentiation in Eurasian perch, Perca fluviatilis [PDF]
, 2007 It is widely accepted that sex steroid hormones play an important and a specific role during the process of sex differentiation in fish. In order to describe the role of the three main sex steroid hormones (testosterone--T, 17beta-estradiol--E2 and ...
Kestemont, Patrick +4 more
core +1 more source
International Journal of Endocrinology, 2016 Objective. To evaluate diagnosis, age of referral, karyotype, and sex of rearing of cases with disorders of sex development (DSD) with ambiguous genitalia. Methods. Retrospective study during 23 years at outpatient clinic of a referral center.
Georgette Beatriz De Paula +21 more
doaj +1 more source
Frontiers in Plant Science, 2022 Flavonoids are important secondary metabolites involved in plant development and environmental responses. Sex differences in flavonoids are common in plants. Broussonetia papyrifera is a dioecious plant that is rich in flavonoids.
Peng Jiao +6 more
doaj +1 more source
Comparative Morphology of the Penis and Clitoris in Four Species of Moles (Talpidae). [PDF]
, 2017 The penile and clitoral anatomy of four species of Talpid moles (broad-footed, star-nosed, hairy-tailed, and Japanese shrew moles) were investigated to define penile and clitoral anatomy and to examine the relationship of the clitoral anatomy with the ...
Ewer RF +15 more
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Impact of butyl benzyl phthalate on development of the reproductive system of European pikeperch, Sander lucioperca (L.) [PDF]
, 2014 The effect of butyl benzyl phthalate (BBP) on the sex differentiation process of fish is practically unknown. The experimental material of this study was juvenile European pikeperch [Sander lucioperca (L.)], which is gonochoristic, undergoes immediate ...
Demska-Zakęś, Krystyna +2 more
core +1 more source
International Journal of Endocrinology, 2012 The aim of this study was to search for clinical and laboratorial data in 46,XY patients with ambiguous genitalia (AG) and normal testosterone (T) synthesis that could help to distinguish partial androgen insensitivity syndrome (PAIS) from 5α-reductase ...
Nélio Neves Veiga-Junior +10 more
doaj +1 more source