People at greatest risk for postpartum psychosis include those who have had it after an earlier birth, those with bipolar I disorder or schizoaffective disorder, and those with a close relative who has experienced postpartum psychosis. A history of another psychotic illness and major sleep loss may also raise risk. However, it can begin after childbirth in someone with no known mental health history.
Which factors increase the risk of postpartum psychosis?
Postpartum psychosis is a rare but serious mental health condition that can begin suddenly after childbirth. According to the Royal College of Psychiatrists, certain personal and family mental health histories are linked to a higher risk. These factors help healthcare professionals identify people who may benefit from additional support and planning before and after delivery.
- A previous episode of postpartum psychosis: Having experienced postpartum psychosis after an earlier pregnancy is one of the strongest known risk factors. The condition may return after a subsequent birth, making advance planning particularly important.
- Bipolar I disorder: People with bipolar I disorder have a substantially increased risk, particularly during the period after childbirth. This history is important even if symptoms have been well controlled during pregnancy.
- Schizoaffective disorder: This condition is also associated with a higher risk of postpartum psychosis.
- A history of another psychotic illness: Schizophrenia and other psychotic disorders may increase risk, although the level of risk varies by condition and personal history.
- A close family history of postpartum psychosis: Risk is higher when a close relative, particularly a mother or sister, has experienced the condition. A family history of bipolar disorder or another psychotic illness may also be relevant.
How much does a previous episode affect future risk?
A previous episode deserves particular attention because the likelihood of recurrence after another birth is substantially increased. The risk is also higher for someone with bipolar I disorder or schizoaffective disorder, especially when there is a close family history of postpartum psychosis. These overlapping factors are important when planning pregnancy and postpartum care.
Risk estimates from individual studies and clinical resources may differ, so a single percentage should not be treated as a personal prediction. A psychiatrist or specialist in perinatal mental health can review the person's previous episodes, treatment history, family history and pregnancy plans to help determine the level of support that may be appropriate.
Can medication changes or sleep loss affect the risk?
Sleep disruption may play a role in postpartum psychosis, although research is still developing. The American College of Obstetricians and Gynecologists (ACOG) identifies sleep deprivation and discontinuation of medication for bipolar disorder among the risk factors associated with postpartum psychosis. These concerns are especially important for people who already have a history of serious mood or psychotic illness.
People taking medication for bipolar disorder or another mental health condition should discuss pregnancy and postpartum plans with their prescribing clinician. Stopping or changing psychiatric medication without medical guidance may increase the risk of relapse in some circumstances. Treatment decisions should balance the benefits of staying well with any potential risks during pregnancy and breastfeeding.
The clinical review Postpartum Psychosis in the NCBI Bookshelf also describes a combination of personal psychiatric history, family history, medication changes and sleep disruption as relevant factors. No single factor explains every case, and sleep loss alone does not establish that postpartum psychosis will occur.
Can postpartum psychosis occur without a history of mental illness?
Yes. The Cleveland Clinic explains that postpartum psychosis can affect someone without a previously diagnosed mental health condition. It is also reported more often after a first birth, but being a first-time parent does not mean that someone will develop the condition. A lack of known risk factors does not eliminate the possibility.
Postpartum psychosis is uncommon. The Royal College of Psychiatrists estimates that it affects about 1 in every 1,000 women who give birth. Its sudden onset means that it may not be possible to predict every case in advance. Knowing the main risk factors is useful, but people without these factors and their families should still be aware of the possibility of a sudden, concerning change in mental state after childbirth.
What can people at higher risk do before and after birth?
Anyone with a history of postpartum psychosis, bipolar I disorder, schizoaffective disorder or another significant psychotic illness should tell their obstetrician, midwife and mental health clinician about this history. Ideally, planning begins before pregnancy. If pregnancy has already started, discussing the history as early as possible gives the care team time to develop an appropriate plan.
A care plan may include reviewing medication, arranging specialist perinatal mental health support, identifying early warning signs and deciding whom to contact if symptoms develop. Planning for practical support and protected opportunities for sleep after delivery may also be helpful. Family members or other trusted people can assist with infant care and household tasks so that the recovering parent has support during the early postpartum period.
Medication should not be stopped solely because of pregnancy or breastfeeding without discussing the options with a qualified clinician. The risks of untreated or recurring illness and the possible effects of medication need to be considered together. A personalised plan can help coordinate care during pregnancy and the weeks after delivery.
When is urgent medical help needed?
Postpartum psychosis often begins during the first two weeks after birth, sometimes within the first few days. It can develop quickly, so a sudden and concerning change in behaviour or thinking needs prompt attention, whether or not the person has known risk factors.
Examples of changes that may require urgent assessment include:
- Sudden confusion or difficulty understanding what is happening around them.
- Hearing voices or seeing things that other people do not perceive.
- Strong beliefs that are disconnected from reality, including unusual fears or suspicions.
- Markedly unusual behaviour, rapidly changing mood or unusually high energy accompanied by little or no need for sleep.
These examples are reasons to seek professional assessment, not a checklist for diagnosing the condition. If postpartum psychosis is suspected, seek emergency medical care immediately through local emergency services or the nearest emergency department. If there is concern that the parent or baby may be in danger, keep a trusted adult with them and arrange for another responsible adult to care for the baby while emergency help is obtained.
ACOG's perinatal mental health guidance advises that suspected postpartum psychosis requires immediate medical attention. Early assessment allows the healthcare team to evaluate the situation and arrange appropriate care.