Determinants of obstructed labour and associated outcomes in referral hospitals in Nigeria.

Objective: To estimate the prevalence of obstructed labour, associated risk factors and outcomes across a network of referral hospitals in Nigeria.

Design: Retrospective observational study.

Setting: A total of 54 referral-level hospitals across the six geopolitical regions of Nigeria.

From low-lying implantation to placenta praevia: a longitudinal ultrasonic assessment.

A study of 895 consecutive pregnant women studied by transabdominal ultrasound scan showed an incidence of 14.6% of low-lying placenta at 12-14 weeks' gestation. Longitudinal follow-up of those with low-lying placenta showed that 85% of them had normally situated placenta at term.