Postnatal Depression

The National Institute for Clinical Excellence (NICE) has recently released guidance on the management of mental health conditions in the antenatal and postnatal period.¹ NICE prefer not to use the term postnatal depression (PND) per se as they are concerned that it should not be used as an umbrella term for all mental illness following delivery.

Depression can occur de novo, can be a recurrence of a depressive condition occurring prior to pregnancy, or be a symptom of a major psychosis such as bipolar disorder.¹ Nevertheless, postnatal depression is a widely recognised concept in the literature, and is considered to be a useful term in many circumstances. The Scottish Intercollegiate Guidelines Network (SIGN) define postnatal depression as any non-psychotic depressive illness of mild to moderate severity occurring during the first postnatal year.²

Postnatal depression is common. The incidence in the first month after childbirth is three times the average monthly incidence in non-childbearing women. A meta-analysis of studies mainly based in the developed world found the incidence of PND to be 12-13% with higher incidence in developing countries.³

Risk Factors

These include:³

• Past history of any psychopathology (including history of previous PND)
• Low social support
• Poor marital relationship
• Recent life events (e.g.bereavement)
• Spousal disappointment with the gender of the newborn child in some cultures

A number of trials also suggest the following factors⁴:

• Parents' perceptions of their own upbringing
• Unplanned pregnancy
• Unemployment
• Not breastfeeding
• Antenatal parental stress
• Antenatal thyroid dysfunction
• Coping style
• Longer time to conception
• Depression in fathers
• Emotional lability ('baby blues')
• Low quality social support
• Having two or more children

Postnatal depression presents with similar symptoms to general depression but with some variation:

• Low mood and loss of enjoyment
• Anxiety
• Disturbed sleep and eating patterns
• Poor concentration
• Low self-esteem
• Low energy levels
• Loss of libido

NICE recommend that women are proactively screened for post-natal depression and high-risk patients identified. It is advised that when women present for booking and at the post-natal check health professionals (including midwives, obstretricians, health visitors and GPs) should ask questions about:

• Past or present severe mental illness including schizophrenia, bipolar disorder, psychosis in the postnatal period and severe depression
• Previous treatment by a psychiatrist/specialist mental health team including inpatient care
• A family history of perinatal mental illness

Diagnosis should be made as soon as possible. Subtle changes in behaviour (often noted by the partner) may be the first symptom of PND.
All women at booking and at post-natal checks should be asked the following screening questions:

• During the past month, have you often been bothered by feeling down, depressed or hopeless?
• During the past month, have you often been bothered by having little interest or pleasure in doing things?

If the woman answers 'Yes' to both questions a further question should be asked:

• Is this something you feel you need or want help with?

Health professions may consider using the Edinburgh Postnatal Depression Scale (EPDS), the Hospital Anxiety and Depression Scale (HADS)⁵ or Patient Health Questionnaire-9 (PHQ-9)⁶ as part of subsequent assessment or to monitor treatment.

Some General Points

• Empowerment Involve patients in decisions about their care. For patients who lack capacity, follow the Department of Health guidelines - Reference Guide to Consent for Examination or Treatment (2001)⁷ - and the code of practice accompanying the accompanying the Mental Capacity Act (which came into force in April 2007).⁸ Family and carers should also be involved, unless the patient expressly forbids it.
• Communication Good communication is important - patients, relatives and carers should be given information in a form that is culturally appropriate and takes account of any physical disabilities that present an obstacle to comprehension (e.g. deafness).
• The Wider Family Environment Consider the needs of other children, dependent adults, the effect the illness may have on relationships with partners.
• Adolescents Bear in mind local and national guidelines concerning confidentiality and the rights of the child. When obtaining consent, issues that may need to to be considered include Gillick competence, child protection concerns, current mental health legislation, and the Children Health Act 1989.
• PND should be treated according to the same NICE guidelines (the 'Stepped Care Approach') as non-puerperal depression with the exception that there is a lower threshold for non-drug management when the patient is breast-feeding.^9,1

Non-Drug Management^1,9

• The evidence supporting one psychological therapy over another is small, so choice should be based on patient preference and availability.
• Watchful waiting may be appropriate for patients with mild depression who do not want any intervention. If this approach is adopted, re-assessment should take place within 2 weeks.
• Self-help strategies - this includes self-help programmes based on cognitive behaviour therapy (CBT), computerised cognitive behaviour therapy, or exercise .¹⁰
• Non-directive counselling delivered at home (listening visits)
• Brief CBT or interpersonal psychotherapy

Drug Therapy¹

• Antidepressants Drug therapy should be considered for any patient with mild, moderate or severe PND who does not respond to, or who does not wish to undertake, non-drug management. All patients should have a discussion about the risks and benefits of medication, but this is particulalry important for breastfeeding mothers. The tricyclics Imipramine, nortriptyline and sertraline are present in breast milk at relatively low levels, whilst the serotonin reuptake inhibitors (SSRIs) citalopram and fluoxetine are present in breast milk at relatively high levels. SSRIs are however better tolerated and less toxic in overdose than tricyclics. NICE do not go as far as recommending any particular drug or group of drugs, and there are indeed no conclusive trials supporting the risk-benefits of any particular drug. Several guidelines support the use of fluoxetine or paroxetine, and consider that reservations concerning their effects on the baby during breast-feeding have been exaggerated.^3,2,11
• Hormones There is no place for synthetic progestogens in the treatment of PND. Long-acting norethisterone is in fact associated with an increased risk of PND. This means that progesterone-only contraceptives should be used with caution in the postnatal period, especially in women with a history of depression before or during pregnancy.^11,12 Oestrogen therapy may be of modest value at a late stage of severe postnatal depression.¹²

Management of Severe Depression

For the management of patients with a pre-pregnancy history of severe mental health disorder (e.g. bipolar disorder) or who develop such a condition in the ante-natal period see Antenatal Mental Health Problems.

Patients with ideas of either suicide or harming the baby should be referred immediately for urgent psychiatric assessment. Child protection procedures may need to be invoked. A few mothers have too severe a depression to be managed solely in primary care and will require the involvement of a psychiatrist; sometimes needing compulsory admission using the Mental Health Act. Dedicated 'mother and baby units' offer the ideal environment but are not available in all areas. Care needs to be delivered and monitored by a multidiscipinary team linking closely with social services and family mental health services.

Although some cases of postnatal depression last less than three months, 30-50% may last for more than six months. One in four affected mothers are still depressed on the child's first birthday. Suicide is the main cause of maternal deaths in the first year postpartum, in the developed world. PND is associated with reduced likelihood of mother-baby bonding and impaired cognitive and emotional development of the child, particularly in areas of socio-economic deprivation.³

Psychological Support¹

• NICE recommend 4-6 sessions of CBT or interpersonal psychotherapy for pregnant women who have symptoms of depression and/or anxiety that do not meet diagnostic criteria but have had a previous episode of depression and anxiety, and have symptoms that significantly interfere with personal and social functioning.¹ For women who have symptoms but no previous such history, social support in the form of regular informal individual or group-based support should be offered. There is no evidence to support the use of such intervention otherwise.
• Single-session formal debriefing focused on the birth should not be routinely offered to women who have experienced a traumatic birth, but healthcare professionals should support women who wish to talk about their experience, encourage them to make use of natural support systems available from family and friends, and take into account the effect of the birth on the partner.
• Mothers whose infants are stillborn or die soon after birth should not be routinely encouraged to see and hold the dead infant, but should be offered an appropriate follow-up appointment in primary or secondary care.

Drugs

A role for oestrogen and for SSRIs has been mooted, but to date there is no definitive evidence to support the use of either.^13,14