Objective: To explore the methods for sex determination on head CT film.
Methods: To establish the sex determination equations by binary regression analysis of cranial skeletal indices obtained on head CT film.
Results: A single element equation by applying the index of the width of ansa capitis and a multi-element equation by applying multitude indices were established.
Conclusion: The equations for sex determination on head CT film were established.
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Early Hum Dev
January 2025
Department of Obstetrics and Gynecology, Faculty of Medicine, Gazi University, Ankara, Turkey.
Purpose: To evaluate the use of anogenital distance (AGD) and genital tubercle length (GTL) between 11 and 13 + 6 weeks of gestation for fetal sex determination and to assess the impact of maternal androgen levels on these measurements.
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State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Background: Spinach ( L.) is an important leafy vegetable with dioecious and occasional monoecious plants. Monoecious lines are more suitable for hybrid production than dioecious lines due to their extended flowering period.
View Article and Find Full Text PDFBiomolecules
January 2025
Área de Genética, Facultad de Ciencias del Mar y Ambientales, INMAR, Universidad de Cádiz, 11510 Cádiz, Spain.
Fish exhibit diverse mechanisms of sex differentiation and determination, shaped by both external and internal influences, often regulated by distinct DNA methylation patterns responding to environmental changes. In aquaculture, reproductive issues in captivity pose significant challenges, particularly the lack of fertilization capabilities in captive-bred males, hindering genetic improvement measures. This study analyzed the methylation patterns and transcriptomic profiles in gonadal tissue DNA from groups differing in rearing conditions and sexual maturity stages.
View Article and Find Full Text PDFAnimals (Basel)
January 2025
Department of Veterinary Science, University of Parma, 43121 Parma, Italy.
Reptile biodiversity is rapidly declining, with over 11,733 recognized species across 1226 genera being documented, many of which are endangered. Captive breeding programs play a crucial role in conservation; however, effective management requires accurate sex determination, especially due to the fact that many reptile species exhibit minimal or no sexual dimorphism. When present, sexual dimorphism manifests as differences such as size, coloration, and morphological features influenced by evolutionary pressures and hormones.
View Article and Find Full Text PDFAnimals (Basel)
January 2025
Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China.
As a fundamental taxonomic group within vertebrates, fish represent an invaluable resource for investigating the mechanisms underlying sex determination and differentiation owing to their extensive geographical distribution and rich biodiversity. Within this biological cohort, the processes of sex determination and differentiation are intricately governed by both genetic factors and the complex interplay of environmental cues. While variations in external environmental factors, particularly temperature, can exert a modulatory influence on sex differentiation in fish to a limited degree, genetic factors remain the primary determinants of sexual traits.
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