Changing trends in pregnancy registration for New Zealand women.

INTRODUCTION: Early pregnancy registration is recommended and provides an opportunity for screening, risk assessment and health promotion.

AIM: To determine the gestation at pregnancy registration for a cohort of pregnant New Zealand women who received maternity care from a midwife Lead Maternity Carer (LMC) and to determine if women are registering earlier in pregnancy.

METHODS: The gestation of pregnancy at registration was reviewed for the 81,821 women who registered with a midwife LMC between 2008 and 2010 and had data recorded in the New Zealand College of Midwives Clinical Outcomes Research Database (COMCORD).

RESULTS: Over the three-year period, there was a trend towards earlier registration with 22.0% of women registering before 10 weeks' gestation in 2008 increasing to 29.9% in 2010. Women of New Zealand European ethnicity were more likely to register before 10 weeks' gestation compared to women who identified as Maori or Pacific ethnicity. Women under 20 or over 40 years of age were more likely to register in the second or third trimester than other age groups.

DISCUSSION: Groups that were slower to register with a midwife LMC were women under 20 years or over 40 years of age and women of Maori or Pacific ethnicity. These groups have higher perinatal mortality rates, higher rates of smoking and lower uptake of antenatal Down syndrome screening. Further research is required to explore the barriers to earlier registration for these groups.