Background. There has been a rise in the prevalence of large newborns over a few decades
in many parts of the world. There is ample evidence that fetal macrosomia is associated with …

Because of the implications for behavioral, social, and cultural evolution, reconstructions of
the evolutionary history of human parturition are driven by two main questions: First, when …

Objective: To quantify the risk of cesarean delivery associated with elective induction of
labor in nulliparous women at term. Methods: We performed a cohort study on a major urban …

Background Among nulliparous women, there appears to be an association between the
use of epidural analgesia during labor and an increased risk of dystocia. We tested the …

OBJECTIVE: To evaluate whether epidural analgesia during the first stage of labor is
associated with an increased risk of cesarean delivery. METHODS: The association of …

Background In contemporary practice many nulliparous women require intervention during
childbirth such as operative vaginal delivery or cesarean delivery (CD). Despite the …

OBJECTIVE: The purpose of this study was to examine lengths of first and second stages of
labor across maternal age groups to determine whether different norms should be …

Objectives: To analyse by parity the obstetric and neonatal outcome of babies delivered
weighing more than 4.5 kg. Methods: All deliveries resulting in a baby weighing more than …

Objective To compare clinical and sonographic estimates of birth weights with five new
estimation techniques that involve measurements of soft tissue, for identifying newborns with …

Objective.—To examine the effect of maternal age on cesarean delivery risk and to quantify
the impact of demographic changes since 1970 on primary cesarean delivery rates. Design …