Uterine activity measured by quantifying active contraction area in induced labour showed an initial significant steep increase (incremental phase) followed by a stable phase when the uterine activity was about 1750 k Pas/15 min in nulliparae and multi‐parae with poor cervical score; it was 1500 k Pas/15 min in multiparae with good cervical score. Once this was achieved, further increase in oxytocin dosage did not increase uterine activity but instead revealed a tendency to hypertonic uterine contractions. A marked rise in uterine activity was observed in the late first stage of labour (terminal phase) despite no increase in oxytocin in patients with good cervical scores (>6) at induction but not in those with poor cervical scores (<5). The uterine activity in the stable phase of oxytocin‐induced labour was not significantly influenced by parity and cervical score except multiparae with a cervical score of six or more who had significantly less uterine activity compared to multiparae with poor cervical score or nulliparae.
|Number of pages||8|
|Journal||Asia‐Oceania Journal of Obstetrics and Gynaecology|
|Publication status||Published - 1986|
- active contraction area
- incremental phase
- stable phase