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Polyamines in amniotic fluid, plasma, and urine during normal pregnancy
American Journal of Obstetrics and Gynecology
|November 15, 1978
Summary
Urinary polyamine levels, including spermine and putrescine, are elevated in normal pregnancies, peaking at 12 weeks gestation. Amniotic fluid polyamine concentrations also vary with gestational age, suggesting potential roles in fetal development monitoring.
Area of Science:
- Biochemistry
- Reproductive Biology
- Clinical Chemistry
Background:
- Polyamines are crucial for cell growth and proliferation.
- Urinary and amniotic fluid polyamine levels may serve as biomarkers for pregnancy status.
Purpose of the Study:
- To investigate the excretion patterns of polyamines (putrescine, spermidine, spermine) during normal human pregnancy.
- To analyze polyamine concentrations in amniotic fluid across different gestational periods.
Main Methods:
- Serial collection and analysis of urine samples from pregnant women.
- Measurement of polyamine concentrations in amniotic fluid at various stages of gestation.
Main Results:
- Elevated urinary levels of putrescine and spermine were observed in normal pregnancies, with spermine showing a >75-fold increase.
- Peak urinary excretion of all three polyamines occurred around 12 weeks of gestation.
- Amniotic fluid putrescine was higher before 30 weeks, while spermidine increased significantly after 30 weeks; spermine remained relatively high.
Conclusions:
- Urinary and amniotic fluid polyamine profiles exhibit distinct patterns during normal pregnancy.
- These findings establish baseline polyamine levels that could be used for comparison in high-risk pregnancies.
- Further research is warranted to explore the utility of polyamines in identifying abnormal fetal development.