Reproductive Capacity of Dairy Bulls. I. Technique for Direct Measurement of Gonadal and Extra-Gonadal Sperm Reserves
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چکیده
منابع مشابه
Gonadal and extragonadal sperm reserves of the domesticated adult African greater cane rat (Thryonomys swinderianus).
Gonadal and extragonadal sperm reserves were determined in twenty sexually matured domesticated African greater cane rats. Mean (+/-SD) sperm numbers in testes and epididymides were 150.40+/-12.93x10(9) and 259.33+/-13.68x10(9), respectively. The mean epididymal distribution of spermatozoa was found as follows: 67.53+/-12.43x10(9) in caput, 89.10+/-13.20x10(9) in corpus, and 102.70 +/-13.71x10(...
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F.N. Male, aged 47 (Hospital No. 61178). He first attended in 1952, aged 37, complaining of recurrent dyspepsia. Radiological examination revealed a small gastric ulcer on the lesser curve of the stomach. He failed to keep his outpatient appointments and was not seen again until his admission in December, 1961 with hiematemesis and melnna. On examination the only abnormality found was a liver e...
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Background In mammals, a single exon gene SRY on the Y-chromosome is activated in the XY gonadal primordium and initiates a cascade of molecular and morphological events leading to testicular differentiation. SRY-encoded protein (SRY) is a transcription factor harboring a HMG-box DNAbinding motif that upregulates SOX9, which encodes another transcription factor sharing the DNA binding motif wit...
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چکیده ندارد.
Extra-gonadal sites of estrogen biosynthesis and function
Estrogens are the key hormones regulating the development and function of reproductive organs in all vertebrates. Recent evidence indicates that estrogens play important roles in the immune system, cancer development, and other critical biological processes related to human well-being. Obviously, the gonads (ovary and testis) are the primary sites of estrogen synthesis, but estrogens synthesize...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1961
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(61)89916-5