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Decreased platelet aggregation during pregnancy correlates with gestational age
1Department of Obstetrics and Gynecology, Hollós József Hospital, Kecskemét, Hungary.
Gynecologic and Obstetric Investigation
|January 1, 1993
Summary
Platelet aggregation decreases during pregnancy, particularly after 13 weeks gestation. This change, measured by platelet count ratio (PCR), correlates with gestational age and may involve placental factors.
Area of Science:
- Obstetrics and Gynecology
- Hematology
- Physiology
Background:
- Platelet function is crucial for hemostasis.
- Changes in platelet parameters are observed during pregnancy.
- Understanding these changes is vital for maternal and fetal health.
Purpose of the Study:
- To investigate in vivo platelet aggregation in pregnant women across different gestational ages.
- To compare platelet aggregation in pregnant versus nonpregnant women.
- To determine the correlation between platelet count ratio (PCR) and gestational age.
Main Methods:
- A modified method was used to assess in vivo platelet aggregation.
- Platelet aggregation was measured in pregnant women at various gestational stages and in nonpregnant controls.
- Platelet count ratio (PCR) was calculated as the ratio of non-aggregated to total circulating platelets.
Main Results:
- Pregnant women showed a higher platelet count ratio (PCR) after 13 weeks gestation.
- In vivo platelet aggregation significantly decreased between 16-30 and 31-41 weeks of gestation.
- PCR demonstrated a significant positive correlation with advancing gestational age.
Conclusions:
- In vivo platelet aggregation diminishes as pregnancy progresses.
- The observed decrease in platelet aggregation is linked to gestational age.
- Factors related to the placenta and uteroplacental vessels likely contribute to these pregnancy-associated hemostatic changes.