Earlier studies describe the half-life of hPL in serum as being ninety minutes and that the hormone is excreted unchanged in urine; consequently, there is real potential to use the fall in hormone levels in urine to monitor bleeding in pregnancy, the outcome of natural and artificial abortions or placental health. This study will focus on the fall of hPL following delivery by Caesarean section when women have a urinary catheter in place and sampling urine is simple to achieve.
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The rate of change in human placental lactogen concentration in urine post delivery by Caesarian section
Timeframe: Baseline and then 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330 & 360 minutes after delivery of the baby by Caesarean section