Data/hora: 12/06/2024 20:54:27

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 01/08/1992
Data da última atualização: | 01/08/2023
Autoria: | RAWLINGS, N. C.; WARD, W. R.
Título: | Progesterone and the initiation of parturition in the goat.
Ano de publicação: | 1977
Fonte/Imprenta: | Theriogenology, v. 7, n. 6, p. 317-329, Jun. 1977.
DOI: | 10.1016/0093-691x(77)90204-7.
Idioma: | Inglês
Conteúdo: | Abstract: The corpora lutea were surgically removed from 6 goats between 134 and 136 days of pregnancy and progesterone was administered daily. Pregnancy was prolonged past normal term in 4 goats receiving 25 mgs. of progesterone daily as a split dose. However, eventual delivery following progesterone withdrawal was abnormal and foetal mortality high. The progesterone therapy regime maintained maternal jugular plasma concentrations of progesterone in excess of 3 ng/ml. In normal untreated goats, maternal plasma concentrations of progesterone declined over the last 6 days of gestation. In treated goats, plasma concentrations of progesterone fell only after the cessation of therapy. Maternal plasma concentrations of estrogen rose within 24 hours of parturition in normal untreated goats. In the 4 goats in which pregnancy was prolonged, by progesterone administration, maternal plasma concentrations of estrogen were elevated for several days in the period before eventual foetal delivery.
Palavras-Chave: | Drug effects; Labor Onset.
Thesagro: | Caprino; Endocrinologia; Progesterona; Reprodução.
Thesaurus Nal: | Estrogens; Females; Goats; Pharmacology; Pregnancy; Progesterone.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (9264-1) - ADD - AP - DD -  -  -  - DIS