Rapid increases in plasma prostaglandin concentrations after vaginal examination and amniotomy. 1977

M D Mitchell, and A P Flint, and J Bibby, and J Brunt, and J M Arnold, and A B Anderson, and A C Turnbull

Peripheral plasma concentrations of 13,14-dihydro-15-keto prostaglandin F (PGFM) were measured in three groups of women after the 37th week of pregnancy. Samples were taken before and five minutes after (a) amniotomy, (b) vaginal examination with sweeping of the fetal membranes, or (c) vaginal examination without sweeping of the membranes. Each procedure significantly raised the circulating PGFM levels, although amniotomy and vaginal examination with membrane sweep were more potent stimuli than vaginal examination alone. These findings suggest that there is a considerable potential for rapid increases in prostaglandin production during late pregnancy and provide a possible explanation for the fact that amniotomy and vaginal examination with membrane sweep often initiate labour.

UI MeSH Term Description Entries
D007751 Labor, Induced Artificially induced UTERINE CONTRACTION. Induced Labor,Induction of Labor,Labor Induced,Labor Induction,Induced, Labor,Induction, Labor,Inductions, Labor,Labor Inductions
D010808 Physical Examination Systematic and thorough inspection of the patient for physical signs of disease or abnormality. Physical Exam,Examination, Physical,Physical Examinations and Diagnoses,Exam, Physical,Examinations, Physical,Exams, Physical,Physical Examinations,Physical Exams
D011247 Pregnancy The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH. Gestation,Pregnancies
D011460 Prostaglandins F (9 alpha,11 alpha,13E,15S)-9,11,15-Trihydroxyprost-13-en-1-oic acid (PGF(1 alpha)); (5Z,9 alpha,11,alpha,13E,15S)-9,11,15-trihydroxyprosta-5,13-dien-1-oic acid (PGF(2 alpha)); (5Z,9 alpha,11 alpha,13E,15S,17Z)-9,11,15-trihydroxyprosta-5,13,17-trien-1-oic acid (PGF(3 alpha)). A family of prostaglandins that includes three of the six naturally occurring prostaglandins. All naturally occurring PGF have an alpha configuration at the 9-carbon position. They stimulate uterine and bronchial smooth muscle and are often used as oxytocics. PGF
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000650 Amnion The innermost membranous sac that surrounds and protects the developing embryo which is bathed in the AMNIOTIC FLUID. Amnion cells are secretory EPITHELIAL CELLS and contribute to the amniotic fluid. Amniotic Membrane,Amnions,Amniotic Membranes,Membrane, Amniotic,Membranes, Amniotic
D014621 Vagina The genital canal in the female, extending from the UTERUS to the VULVA. (Stedman, 25th ed) Vaginas

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