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Serum L.H. of non-laying hens (NL.) was significantly higher than serum LH of layers (L.). All NL. hens showed a marked increase in serum L.H. within 5 min. of an i.v. injection of 20 or 40 micrograms of L.H.R.H. The L.H. levels of NL. hens were significantly lower at 15 min. after L.H.R.H. injection than at 5 min. The laying turkeys were erratic in their response, with clear cut, small rises in L.H. occurring only in some individuals with hard shelled eggs in utero. Hens with membranous eggs or with empty uteri failed to respond to the L.H.R.H. While F.S.H./L.H. injections caused significant ovarian and oviducal growth, L.H.R.H. given by daily i.m. injection for 7 days or twice daily i.v. injection for 6 days failed to do so. Subcutaneous implants of 1 mg. of L.H.R.H. in polyacrylamide gel led to prolonged elevation in serum L.H.R.H. and increased serum L.H. for about 12 hr. but caused no change in ovarian or oviducal weights.
W H Burke, and
E A Cogger
February 1988,
Poultry science,
W H Burke, and
E A Cogger
October 1998,
Gynecological endocrinology : the official journal of the International Society of Gynecological Endocrinology,
W H Burke, and
E A Cogger
June 1977,
South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde,
W H Burke, and
E A Cogger
January 1997,
Hormone research,
W H Burke, and
E A Cogger
January 1974,
Andrologia,
W H Burke, and
E A Cogger
July 1979,
Endocrinology,
W H Burke, and
E A Cogger
May 1987,
Biology of reproduction,
W H Burke, and
E A Cogger
June 1975,
The Journal of endocrinology,
W H Burke, and
E A Cogger
April 1993,
Fertility and sterility,
