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The promise of pharmacologic modification of ovum transport in contraceptive development.

Abstract：

:The mechanisms whereby estradiol retards ovum transport through the rabbit oviduct were investigated. 40 controls were given intravenous injections of 100 units of human chorionic gonadotropin (HCG). (Ovulation follows injection by 10-14 hours.) 24 hours after injection 20 controls were sacrificed; a 90.5% recovery rate of tubal ova was achieved. Recovery in the 20 controls sacrificed at 72 hours was 8.1%, the low percentage expected since passage of most ova should have been completed. Each of the 8 experimental groups included 15 rabbits; recovery in each case was at 72 hours after injection of HCG. In progesterone-, phenoxybenzamine-, and progesterone-plus-phenoxybenzamine-treated rabbits, ovum recovery was similar to that in the 72-hour controls. The recovery rates of the depot-estradiol (intramuscular injection of estradiol cyclopentylpropionate) and crystalline-estradiol (intramuscular injection of ethanolic solution of crystalline 17-beta-estradiol) groups were similar to each other but significantly (p less than .01) greater than that of the 72-hour controls, indicating retention of ova in the oviducts. Progesterone and phenoxybenzamine incompletely, though significantly, reversed the retention effect when given with estradiol. When both progesterone and phenoxybenzamine were given in addition to estradiol, the retention effect was completely reversed. Judging from the progesterone and phenoxybenzamine experiments, the estradiol-induced retention effect involves at least 2 mechanisms; one of these mechanisms can be antagonized by alpha-adrenergic blocking (phenoxybenzamine).

journal_name

Am J Obstet Gynecol

journal_title

American journal of obstetrics and gynecology

authors

Pauerstein CJ,Fremming BD,Hodgson BJ,Martin JE

doi

10.1016/0002-9378(73)91043-0

subject

Has Abstract

pub_date

1973-05-15 00:00:00

pages

161-6

issue

2

eissn

0002-9378

issn

1097-6868

pii

0002-9378(73)91043-0

journal_volume

116

pub_type

杂志文章

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