Eating disorder relapse during pregnancy

By trimester

Weeks 1–13

1st trimester

The first 20 weeks are described in eating-disorder pregnancy research as the highest-risk window for relapse, and in one study, temporary symptom flares clustered within the first 3 months after conceiving before easing again for most of the women affected.

Weeks 14–27

2nd trimester

Qualitative research on pregnant women with an eating-disorder history describes this stage as when visible body changes intensify both perfectionistic pressure to look like an idealized pregnant body and, for others, a felt loss of control over food.

Weeks 28–birth

3rd trimester

By the third trimester, research describes divergent paths: some women's symptoms have stayed quiet since early pregnancy, while for others, especially those whose disordered eating went quiet during pregnancy itself, the harder stretch is still ahead in the early postpartum months rather than now.

What does the evidence show for eating disorder relapse?

• In a study that followed 24 women who had reached remission from an eating disorder and then became pregnant, most with a history of bulimia nervosa, 67% had a return of eating-disorder symptoms during the pregnancy itself and 50% relapsed again after birth. 1
• In that same study, 16 of the 24 women had a temporary relapse within the first 3 months after conceiving, earlier age at both the original illness and the original remission were linked to a higher chance of relapse, and half of the group went on to have postpartum depression. 1
• In-depth interviews with 24 pregnant women who had a history of an eating disorder found that 23 of the 24 experienced a worsening or return of symptoms during pregnancy, most often centered on a felt loss of control over food as body changes made old coping rules harder to follow. 2
• That same research described a recognizable perfectionism pattern, some women describing pressure to be seen as the calm, thin, ideal pregnant woman even while privately restricting weight gain, alongside a separate pattern where nausea and shame around vomiting blurred the line between morning sickness and a returning eating disorder. 2
• A separate interview study of 24 women with a history of severe eating disorders identified five distinct patterns in how symptoms moved through pregnancy and the first several postpartum months, ranging from staying quiet throughout to worsening across both periods, and named the first 20 weeks of pregnancy as the highest-risk window for relapse. 3
• In that same study, postpartum depression was identified in 14 of the 24 women by 4 to 6 months after birth, and one named pattern, eating-disorder symptoms staying quiet during pregnancy only to worsen after the baby arrived, was common enough to form its own category. 3
• NIMH describes postpartum psychosis as a psychiatric emergency requiring hospitalization, separate from a general return of eating-disorder symptoms, and lists the National Maternal Mental Health Hotline, reachable by calling or texting 1-833-852-6262, as a free, 24-hour mental health resource for before, during, and after pregnancy. 4

When should I call my provider about eating disorder relapse?

Fainting, an irregular or racing heartbeat, marked weakness, or inability to keep fluids down needs urgent medical assessment now. Call emergency services for collapse, chest pain, trouble breathing, or immediate danger. Contact your maternity and eating-disorder teams promptly when restriction, purging, or compulsive exercise returns; do not wait for a routine visit. For suicidal thoughts, call or text 988 now, and call 911 if you may act or cannot stay safe. After birth, hallucinations, delusions, or severe confusion are also emergencies. The National Maternal Mental Health Hotline at 1-833-852-6262 offers additional support. Trust your read on your own body. If something feels off beyond the list above, please consult your healthcare provider rather than waiting it out.