Differences in meconium stained amniotic fluid in an Australian population: A retrospective study

Area of Science:

• Obstetrics and Gynecology
• Perinatal Health
• Epidemiology

Background:

• Meconium stained amniotic fluid (MSAF) is common in post-term pregnancies (>40 weeks gestation), often indicating fetal maturity.
• Existing research suggests variations in fetal maturation rates across different ethnic groups.

Purpose of the Study:

• To investigate and compare the incidence of MSAF between Australian-born and non-Australian born women.
• To identify potential disparities in perinatal outcomes based on maternal country of birth.

Main Methods:

• Retrospective correlation study utilizing birth outcome data from a tertiary hospital (January 1st - December 31st, 2014).
• Inclusion criteria: term (>=37 weeks gestation), singleton, liveborn infants.
• Statistical analysis included Chi-Square, Independent t-test, and Mann-Whitney U tests (p<0.05 significance).

Main Results:

• A total of 3,041 women were analyzed (1131 Australian-born, 1910 non-Australian born).
• MSAF was more frequent in non-Australian born women (23.5%) compared to Australian-born women (19.8%, p=0.02).
• Infants of non-Australian born mothers were smaller (mean 3265g vs 3442g, p<0.001), with no significant difference in gestational length (p=0.06).
• Increased gestational age (>=42 weeks) was strongly associated with MSAF (OR 3.52, p<0.001).

Conclusions:

• Maternity services should record maternal ethnicity and region of birth for personalized care.
• Women born overseas may experience poorer perinatal outcomes compared to Australian-born women.
• Further research into ethnic variations in fetal maturation and perinatal health is warranted.