Fetal Heart Rate Variation During Uncomplicated Labour
Article first published online: 12 JAN 2011
1971 Acta Obstet Gynecol Scand
Acta Obstetricia et Gynecologica Scandinavica
Volume 50, Issue 3, pages 197–202, January 1971
How to Cite
Westin, B. and Huldt, L. (1971), Fetal Heart Rate Variation During Uncomplicated Labour. Acta Obstetricia et Gynecologica Scandinavica, 50: 197–202. doi: 10.3109/00016347109157310
- Issue published online: 12 JAN 2011
- Article first published online: 12 JAN 2011
A prospective longitudinal and cross-sectional study of FHR was performed on 110 healthy multiparae during normal labour. Auscultations during 15 second-periods were performed immediately after a contraction and 1 min later and related to the station of the fetal head. No significant differences in mean-FHR were found between related early and late observations during the whole process of labour.
The mean-FHR decreased significantly during the passage of the fetus through the birth canal. During the second stage the cross-sectional biological variation of FHR was twice as large as during the first stage. In the individual subject the maximal difference between related early and late observations following a contraction increased with 70% when the fetal head reached the pelvic floor.
The data are compared with those from a previous investigation on nulliparae. Auscultograms for practical clinical use are presented.