Relationship between fetal head station established using an open magnetic resonance imaging scanner and the angle of progression determined by transperineal ultrasound. (33/61)

No reduction in instrumental vaginal births and no increased risk for adverse perineal outcome in nulliparous women giving birth on a birth seat: results of a Swedish randomized controlled trial. (34/61)

Intrapartum sonographic imaging of fetal head asynclitism. (35/61)

Abdominal muscle electrical activity during labor expulsive stage: a cross-sectional study. (36/61)

Increasing maternal body mass index and characteristics of the second stage of labor. (37/61)

Changes in labor patterns over 50 years. (38/61)

Spontaneous subcutaneous emphysema and pneumomediastinum during second stage of labour. (39/61)

Undiagnosed rectal tumour--a rare cause of obstructed labour in the second stage. (40/61)

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