Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1987-7-2
pubmed:abstractText
The normal physiology of the hypothalamic-pituitary-testicular axis in man is reviewed. According to current concepts, LH plays an important role in the initiation and maintenance of spermatogenesis by stimulating Leydig cell production of high concentrations of T within the testes. FSH is thought to be important in spermatid maturation (spermiogenesis) during the initiation of spermatogenesis by stimulation of Sertoli cells. Studies of selective gonadotrophin replacement in experimentally-induced hypogonadotrophic hypogonadal men demonstrate that qualitatively normal sperm production can be achieved by replacement of either LH or FSH alone, but both LH and FSH are necessary to maintain quantitatively normal spermatogenesis. Studies of gonadotrophin replacement in spontaneously-occurring hypogonadotrophic men suggest that the requirement for FSH activity to stimulate sperm production is greatest during the initiation of sperm production at the time of puberty. The initiation of spermatogenesis in postpubertal men with acquired hypogonadotrophic hypogonadism and the maintenance of spermatogenesis after its initiation can often be achieved with LH activity alone.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0950-351X
pubmed:author
pubmed:issnType
Print
pubmed:volume
1
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
71-87
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Endocrinology of the hypothalamic-pituitary-testicular axis with particular reference to the hormonal control of spermatogenesis.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S., Review