Blood flow and progesterone levels in the ovary of cycling and pregnant pigs

Abstract

The APS Journal Legacy Content is the corpus of 100 years of historical scientific research from the American Physiological Society research journals. This package goes back to the first issue of each of the APS journals including the American Journal of Physiology, first published in 1898. The full text scanned images of the printed pages are easily searchable. Downloads quickly in PDF format.

Ovarian and luteal blood flow, and peripheral plasma progesterone levels, in cyclic guinea-pigs

“…Niswender, Reimers, Diekman & Nett (1976) concluded that blood flow to the corpus luteum may be important in the regulation of luteal function, including changes occurring during luteal regression. However, other workers including Rathmacher & Anderson (1968) in the pig, Bruce & Hillier (1974) in the rabbit, and McCracken, Glew & Scaramuzzi (1970) and Baird (1974) in the sheep, have argued against a vascular mechanism of luteolysis, because declining blood flow could not be shown to precede the fall in progesterone secretion during luteal regression.…”

Ovarian Bloodflow in Sheep During the Oestrous Cycle

“…Levels of progesterone circulating in the blood may control ovarian bloodflow by affecting the tone of the ovarian vessels. Thus, it has been shown that pro¬ gesterone can reduce the vasoconstrictor effects of vasopressin, oxytocin or angiotensin (Lloyd, 1959;Hettiaratchi & Pickford, 1968 (Rathmacher & Anderson, 1968), there is a selective reduction in the bloodflow to the corpus luteum.…”

THE PO2, PCO2, pH AND OXYGEN CONTENT OF OVARIAN VENOUS BLOOD OF SHEEP

“…This difference is probably 31-2 410 D. T. Baird, M. Giles and F. Cockburn related to compensatory hypertrophy in the transplanted ovary after removal of the other ovary (Sundaram & Stob, 1967) and to the fact that depression of blood flow may occur during measurements in situ owing to cannulation and general anaesthesia. The tissue blood flow (3-4 ml/g/min) calculated from the ovary in situ and the ovary autotransplanted to the neck, was several times higher than capillary flows for the sheep ovary (0-2-0-3 ml/g/min; Setchell, 1969) or the sow ovary (0-53 ml/g/min; Rattmacher & Anderson, 1968). In women the mean ovarian blood flow (calculated by the Fick principle; Baird, 1970) of 20-3±3-3 (s.e.m.)…”