The hidden issue of anorexia in pregnancy – Monash-led study provides world first guidelines for management

28 March 2022

Pregnant women with anorexia are at greater risk of having a stillbirth, underweight baby or pre-term birth, yet there are no clear guidelines for how doctors should manage the condition, according to a Monash University-led study.

Led by Professor Megan Galbally, Director of the Centre for Women’s and Children’s Mental Health at Monash University’s School of Clinical Sciences, researchers have developed recommendations and principles for multidisciplinary management of anorexia nervosa in pregnancy.

These recommendations, published in The Lancet Psychiatry,  include a focus on the specialist mental health, obstetric, medical, and nutritional care required to ensure optimal outcomes for women and their infants.

Anorexia nervosa has an increased prevalence in women across childbearing years, with up to one in 200 pregnant women with the condition. It is typically associated with restricting or binging and purging behaviours, or both.

There are no Australian guidelines that include recommendations for anorexia nervosa in pregnancy.

Professor Galbally says there is a paucity of studies and clinical advice on managing pregnant women with anorexia.

“Unlike mood disorders and anxiety and psychotic disorders, little guidance and research is available for anorexia nervosa in pregnancy. Perinatal mental health guidelines, including those in the UK and Australia, provide only limited or no mention of the assessment and management of eating disorders in pregnancy,” she said.

“Assessment measures used outside of pregnancy, such as the Eating Disorder Inventory, or the reliance on body mass index, have been shown to have limited validity in pregnancy.

“Clearly, the assessment and monitoring of measures and tools for anorexia nervosa require modification in the context of pregnancy.”

Research into managing the health of pregnant women in general has highlighted the importance of maternal antenatal nutrition, pregnancy weight gain, and the infant’s birth weight as critical risk factors and vital intervention points for improving lifelong health including for areas such as heart disease, diabetes and obesity.

According to the study authors, anorexia nervosa might affect obstetric and neonatal outcomes through low calorie intake, nutritional and vitamin deficiencies, stress, fasting, low body mass, and problems with the function of the placenta.

Additionally, risks from untreated or undertreated anorexia nervosa in pregnancy include psychological and psychosocial risks, including perinatal depression and anxiety.

For women with anorexia nervosa, there is an increase in reported obstetric complications. A 2020 study from Canada reported that women with anorexia nervosa in pregnancy had 1.32 times the risk of pre-term birth, 1.69 times the adjusted risk of a baby with low birth weight, and 1.99 times the adjusted risk of stillbirth compared with women without anorexia nervosa in pregnancy.

“The management of anorexia nervosa requires a multidisciplinary team approach with expertise across mental health, specialist medical care, and dietetics at a minimum; in pregnancy, key experts include obstetricians (particularly experts who manage high-risk pregnancies), physicians with pregnancy expertise, dieticians who also have expertise in pregnancy nutrition requirements, paediatricians, and mental health clinicians with perinatal expertise,” the authors recommend.

“Although many of the principles developed for the management of anorexia nervosa in adults are applicable in pregnancy, they require expert modification and adaptation to the substantial physiological, psychological, and social changes in pregnancy, and foetal growth and wellbeing should also be taken into consideration.”

About Monash University

Monash University is Australia’s largest university with more than 80,000 students. In the 60 years since its foundation, it has developed a reputation for world-leading high-impact research, quality teaching, and inspiring innovation.

With four campuses in Australia and a presence in Malaysia, China, India, Indonesia and Italy, it is one of the most internationalised Australian universities.

As a leading international medical research university with the largest medical faculty in Australia and integration with leading Australian teaching hospitals, we consistently rank in the top 50 universities worldwide for clinical, pre-clinical and health sciences.

For more news, visit Medicine, Nursing and Health Sciences or Monash University.

MEDIA ENQUIRIES

E: media@monash.edu

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