H. J. Howard

Works (3)

Updated: July 6th, 2023 21:20

1990 journal article

Extension of oestrous cycles and prolonged secretion of progesterone in non-pregnant cattle infused continuously with oxytocin

Journal of Reproduction & Fertility, 90(2), 493.

By: H. Howard n, D. Morbeck  n & J. Britt n

MeSH headings : Animals; Cattle; Dinoprost / analogs & derivatives; Dinoprost / metabolism; Estradiol / blood; Estradiol / metabolism; Estrus / drug effects; Female; Infusions, Intravenous; Luteolysis / drug effects; Oxytocin / administration & dosage; Oxytocin / pharmacology; Progesterone / blood; Progesterone / metabolism; Secretory Rate / drug effects
TL;DR: It is concluded that continuous infusion of oxytocin caused extended oestrous cycles, prolonged the secretion of progesterone, and reduced the amplitude of PGFM pulses. (via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018

1990 journal article

Mechanisms of extended corpus luteum function in dairy cattle treated with human chorionic gonadotropin or infused continuously with oxytocin

Dissertation Abstracts International. B, Sciences and Engineering, 51(2), 607.

By: H. Howard

Source: NC State University Libraries
Added: August 6, 2018

1990 journal article

Prostaglandin F-2alpha causes regression of an HCG-induced corpus luteum before day 5 of its lifespan in cattle

Journal of Reproduction & Fertility, 90(1), 245.

By: H. Howard n & J. Britt n

MeSH headings : Animals; Cattle; Chorionic Gonadotropin / pharmacology; Corpus Luteum / drug effects; Dinoprost / pharmacology; Estradiol / blood; Estrus / drug effects; Female; Luteolysis / drug effects; Progesterone / blood; Time Factors
TL;DR: Luteolysis occurred immediately in heifers given PGF-2 alpha on Day 6 of the sham cycle or on Day 12, 14 or 16 of the hCG-treated cycle, with concentration of progesterone in serum decreasing to less than 1 ng/ml within 2 days. (via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018

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