Relationship between fetal station and successful vaginal delivery in nulliparous women.
OBJECTIVE
To study the relationship between fetal station and successful vaginal delivery in nulliparous women.


METHODS
This was a secondary analysis from a previously reported trial of pulse oximetry. Vaginal delivery rates were evaluated and compared with respect to the fetal station. Spontaneous labor and induction of labor groups were evaluated separately. Multivariable logistic regression analysis was performed to adjust for confounding factors.


RESULTS
Successful vaginal delivery was more frequent with an engaged vertex for spontaneous labor (86.2% versus 78.6%; p = 0.01) and induced labor (87.7% versus 66.1%; p < 0.01). After adjustment, engaged fetal vertex was not associated with vaginal delivery for spontaneous labor (odds ratio [OR] 1.5; 95% confidence interval [CI] 0.95 to 2.3; p = 0.08) or for women with induced labor (OR 2.2; 95% CI 0.96 to 5.1; p = 0.06).


CONCLUSIONS
Among nulliparous women enrolled in the FOX randomized trial in spontaneous labor or for labor induction, an engaged fetal vertex does not affect their vaginal delivery rate.
Department of Obstetrics and Gynecology at the Oregon Health and Science University, Portland, OR, USA. sysegel@gmail.com
Sally Y
SY
Segel
Carlos A
CA
Carreño
Steven J
SJ
Weiner
Steven L
SL
Bloom
Catherine Y
CY
Spong
Michael W
MW
Varner
Dwight J
DJ
Rouse
Steve N
SN
Caritis
William A
WA
Grobman
Yoram
Y
Sorokin
Anthony
A
Sciscione
Brian M
BM
Mercer
John M
JM
Thorp
Fergal D
FD
Malone
Margaret
M
Harper
Jay D
JD
Iams
D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D007746:Labor Presentation; D007747:Labor Stage, First; D007751:Labor, Induced; D015999:Multivariate Analysis; D010298:Parity; D011247:Pregnancy