T. N. Leung

Trends in maternal obesity and associated risks of adverse pregnancy outcomes in a population of Chinese women.

Objective  To assess the effect of increasing body mass index (BMI) on pregnancy outcome in a population of Chinese women.

Effect of twin-to-twin delivery interval on umbilical cord blood gas in the second twins

Objective To examine the effect of twin‐to‐twin delivery interval on the umbilical cord blood gas status of the second twin following vaginal delivery.

Elevated mid-trimester maternal corticotrophin-releasing hormone levels in pregnancies that delivered before 34 weeks.

Objective To test whether maternal corticotrophin‐releasing hormone levels are elevated in the mid–trimester for those women who subsequently had spontaneous preterm delivery and to assess the clinical utility of the measurement in the prediction of preterm delivery.

Fetal intra‐abdominal umbilical vein varix: what is the clinical significance?

To assess the clinical significance of fetal intra‐abdominal umbilical vein (FIUV) varix.

Prediction of birth weight by fetal crown-rump length and maternal serum levels of pregnancy-associated plasma protein-A in the first trimester

To determine whether the first trimester crown–rump length (CRL), maternal serum levels of pregnancy‐associated plasma protein A (PAPP‐A) and free beta‐human chorionic gonadotropin (fβ‐hCG) are independent predictors of birth weight.

Customizing fetal biometric charts

To study the effects of maternal and pregnancy characteristics on fetal biometric size using longitudinal ultrasound measurements and to construct customized models for fetal biometric size charts.

First-trimester combined screening for trisomy 21 in a predominantly Chinese population

To examine the effectiveness of first‐trimester fetal trisomy 21 screening using a combination of maternal age, nuchal translucency thickness (NT) and maternal serum free beta‐human chorionic gonadotropin (β‐hCG) and pregnancy‐associated plasma protein‐A (PAPP‐A) levels in a predominantly Chinese population in Hong Kong.

A longitudinal observational study of preference for elective caesarean section among nulliparous Hong Kong Chinese women

Objective  To establish whether women’s preference for elective caesarean section (ELCS) changes as gestation advances.

Deterioration in cord blood gas status during the second stage of labour is more rapid in the second twin than in the first twin

Objective  To compare in twin pregnancy the rate of deterioration in umbilical blood gas status during the second stage of labour, and to investigate whether the duration of the first twins delivery has any effect on the blood gas status of the second twin.

Fetal crown–rump length and estimation of gestational age in an ethnic Chinese population

To develop a sonographic dating formula based on fetal crown–rump length (CRL) in a Hong Kong Chinese population, quantify its systematic prediction error and compare its performance with established dating formulae.