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Monitoring female reproductive function by measurement of fecal estrogen and progesterone metabolites in the white-faced saki (Pithecia pithecia)
(Wiley-Liss, 1994)
A simple method for extracting and measuring ovarian steroids in feces is
applied to the ovarian cycle, pregnancy, parturition, and period of lacta tional amenorrhea in Pithecia pithecia. Small amounts of wet, unmixed ...
Morphological features of the seminiferous and cauda Epididymides epithelia of breeding zebu bulls with normal and decreased testicular consistency
(The Society for Reproduction and Development, 1999)
The fine morphology of the testes and epididymes collected from breeding Zebu (Bos indicus) bulls with normal or decreased testicular consistency (TC) at clinical palpation was studied. The ultrastructure of testicles with ...
Tricomoniasis y campilobacteriosis genital bovina: diagnóstico e importancia en explotaciones ganaderas en el trópico costarricense.
(Universidad Nacional, Costa Rica, 2022)
El presente video ha sido elaborado por el Programa de Investigación en Andrología Animal Aplicada de la Escuela de Medicina Veterinaria, Universidad Nacional (UNA), Heredia-Costa Rica, a partir de recursos digitales ...
Event-time analysis of reproductive traits of dairy heifers
(Elsevier, 1998-11)
Data on the reproductive traits of dairy heifers
were analyzed using event-time techniques. Traits
analyzed were age at first calving (n = 4631), days to
first breeding, and days open (n = 1992) during the
first ...
Práctica dirigida en salud de hato y control de la producción en fincas lecheras especializadas de las localidades de Poasito, Los Cartagos y Vara Blanca, con énfasis en transición de la primeriza
(Universidad Nacional, Costa Rica, 2022)
El objetivo de la práctica dirigida fue incrementar los conocimientos, habilidades y destrezas orientadas al manejo del período de transición de las novillas en hatos bovinos de lechería especializada. La práctica se realizó ...
Seasonal variations in testicular consistency, scrotal circumference and spermiogramme parameters of extensively reared Brahman (Bos indicus) bulls in the tropics
(Elsevier, 2002-07)
Twenty-five extensively bred mature Brahman (Bos indicus) breeding bulls were clinically examined and electroejaculated at monthly intervals for 13 months to study whether testicular consistency (TC), scrotal circumference ...
Tail stump sperm defect as a cause of sterility in an indobrasil (Bus indicus) bull
(Blackwell Wissenschafts-Verlag, Berlin, 1998)
The first known case of an Indobrasil (BOA indicus) bull, with a
frequency of 100% of the specific sperm abnormality, known
as ‘tail stump sperm defect’ is reported. A 5-year old bull was
located as a breeding sire in ...
Thermographic scrotal pattern in sound for breeding zebu bulls extensively managed in tropical Costa Rica
(Animal Reproduction Science, 2016-06)
Infrared thermography (IR) is relatively a novel proce-
dure in animal andrology for studying bull’s scrotal thermal
pattern. The accuracy of this technique lies onto camera’s
performance and operator skills, and ...
Backfat thickness does affect the restoration of ovarian activita postpartum in different breeding programs in zebu cattle
(Frontiers in Veterinary Science, 2021-12-09)
The backfat thickness (BFT) was used to forecast the onset of ovarian activity and predict
the calf growth. Eighty Brahman cows with their calves were allocated in two groups
of 40 distributed in 4 months according to ...
Effects of season on donor and recipient cows and calf performance from birth to weaning in embryo transfer programs in the tropics
(MDPI, 2021-12-19)
The aim of this study was to assess the seasonal effect of an embryo transfer program in
the tropics on the donor response, recipient reproductive performance and calf growth from birth to
weaning. This study included ...