Royal College of Surgeons in Ireland
Platelet Function in Normal Pregnancy.pdf (2.42 MB)

Platelet Function in Normal Pregnancy

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posted on 2019-11-22, 18:21 authored by Naomi Burke

The concept for this thesis arose after a collaboration between the Platelet Biology Laboratory and the Department of Obstetrics and Gyanecology in the Royal College of Surgeons in Ireland. They discovered a significant difference in platelet aggregation in women with a history of recurrent pregnancy loss using a novel platelet assay. This posed the question as to whether or not this platelet assay would eludicate different platelet reactivity at different time points in a normal, heathy pregnancy. The objective was to critically evaluate platelet reactivity in normal pregnancy using this assay which assessed platelet aggregation to several agonists at multiple submaximal doses using a modification of light transmission aggregometry. Two groups of women were examined in the study; a non-pregnant control group and pregnant women assessed longitudinally in normal pregnancy and in the postnatal period. There are two main findings in this thesis. Firstly, in the first trimester of pregnancy there is a reduction in platelet reactivity compared to the non-pregnant controls in response to collagen, epinephrine and also seen with spontaneous platelet aggregation. Secondly, there was an increase in platelet reactivity in the second and third trimesters of pregnancy in relation to the agonist arachidonic acid. There are a number of potential hypotheses which may explain these findings. Matrix metalloproteinases, prostacyclin, female sex steroids, intrinsic inhibitors of platelets and other coagulation factors are explored in this thesis to identify their hypothetical role in influencing platelet function in pregnancy.


The Rotunda Foundation


First Supervisor

Professor Fergal Malone

Second Supervisor

Professor Dermot Kenny


A thesis submitted for the degree of Doctor of Medicine from the Royal College of Surgeons in Ireland in 2018.

Published Citation

Burke N. Platelet Function in Normal Pregnancy [MD Thesis]. Dublin: Royal College of Surgeons in Ireland; 2018.

Degree Name

  • Doctor of Medicine (MD)

Date of award


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