Intimate partner violence (IPV) is a significant and pervasive public health challenge and is associated with mental illnesses such as depression, anxiety and posttraumatic stress disorder (PTSD). Although the perinatal period may be a time of greater risk for experiencing IPV, and greater vulnerability to PTSD symptomatology, a lack of research exists pertaining to the identification/treatment of IPV-related PTSD symptoms during this period. Utilizing a mixed-methods approach, and employing a feminist, intersectional framework, the effectiveness of trauma-informed cognitive behavioural therapy (CBT) among pregnant survivors of IPV experiencing PTSD symptomatology on depression, anxiety, PTSD and maternal-infant attachment will be explored.

IPV is a pervasive public health problem [1], with estimates of approximately 50% of Canadian women experiencing IPV at least once during their lifetime [2]. Some studies suggest that the perinatal period is a time of higher risk for experiencing IPV [3-4]. Numerous studies have linked women's experience of IPV with mental health concerns such as depression, anxiety and PTSD [5-8] and rates of PTSD are higher for perinatal women compared to the general population [9-10]. Prevalence rates of PTSD among survivors of IPV range from 31-84% [7,11].

The perinatal period may relate to greater risk for re-triggering of PTSD, given the physical/emotional changes, and the intimate/invasive nature of perinatal care. Additionally, the medicalized processes involved may contribute to feelings of powerlessness and vulnerability, further compromising at-risk women [9]. PTSD can alter psychological functioning and is associated with depression [12], disordered eating, substance abuse, sexual risk exposures and re-victimization [13] and failure to engage in health promotion strategies such as exercise, diet and routine health care [14]; all of which may exacerbate obstetrical risk. Furthermore, mental illness and trauma have been associated with infant prematurity, low birth weight and childhood developmental delays [15] in addition to adverse effects on maternal functioning such as maternal-child attachment [15]. As such, there are enormous personal and societal costs associated with PTSD related to IPV for childbearing women.

Recently, a significant gap in the literature was identified pertaining to the identification and treatment of IPV-related PTSD of childbearing women [16]. There is a critical need for individualized, trauma-informed care to facilitate optimal maternal and child attachment outcomes [16]. Fortunately, effective PTSD treatments exist, such as CBT; however, research exploring CBT in pregnant populations is lacking [17]. As such, the purpose of this study is to explore the effectiveness of CBT for the treatment of IPV-related PTSD among antenatal women.

Inclusion Criteria:

Women who received antenatal CBT treatment from the Perinatal Nurse Specialist at the Perinatal Mental Health Clinic (London Health Sciences Centre, London, ON, Canada) who are:

• English speaking
• Have symptoms consistent with PTSD, depression, and/or anxiety

Exclusion Criteria:

• Women will be excluded if there is, or if it anticipated that there will be involvement in child protection services under the Child and Family Services Act

This study applies to postpartum women

Women will be recruited from the perinatal clinic at London Health Sciences (LHSC), London, Ontario, Canada. London, Ontario is an urban setting with a population of approximately 350,000. LHSC is one of Canada's largest acute-care teaching hospitals.