The perinatal period represents a time of increased vulnerability
to experience psychological distress in many women. Postpartum
depression (PPD) is a well-recognised mental health concern that
is known to have deleterious effects on some new mothers and
their relationship with their spouse and infant. Recently,
anxiety and stress have been recognised as symptoms that are
commonly comorbid with (or occur independently of) perinatal
depression, although less is known about the psychological and
non-psychological risk factors for these affective states. Thus,
using a community sample of 105 women in their third-trimester of
pregnancy, the aim of this thesis was to broaden the current
conceptualisation of psychological distress in the perinatal
period to include the affective states of psychological stress
and anxiety, and to examine a broad range of factors that have
previously been identified as risk factors for perinatal
depression, and to assess their potential role in the aetiology
of perinatal anxiety and stress.
Paper 1 examined the relationship between attachment-avoidance,
attachment-anxiety, and marital relationship quality during
pregnancy, and symptoms of postpartum depression, anxiety, and
stress. The study results indicated that marital satisfaction and
emotional affection significantly predicted depression levels,
and marital satisfaction significantly predicted anxiety levels.
In addition, mediational analyses indicated that dyadic
satisfaction significantly mediated the relationships between
high attachment-anxiety to worse anxiety and depression, and it
also mediated the relationship between high attachment-avoidance
to later anxiety and depression symptoms.
Paper 2 explored the potential contribution of
attachment-avoidance and attachment-anxiety in a woman’s
relationships with her parents and close friends and the
association of these factors to her experience of depression,
anxiety, and stress during the third-trimester of pregnancy and
4-6 months postpartum. In addition, changes in the women’s
attachment networks were examined across the transition to
parenthood. The study results showed that women who were high on
attachment-anxiety in relation to their mothers and close friends
were more likely to experience depression during pregnancy, but
only attachment-anxiety to their mothers predicted high
depression levels postpartum. In addition, women’s
attachment-anxiety to their mothers and attachment-avoidance to
their friends predicted high anxiety levels during pregnancy, and
attachment-anxiety to their mothers predicted high stress levels
during pregnancy. Further, the size of the women’s attachment
networks remained stable from the third-trimester to the
postpartum, although they tended to rely less on their partners
and close friends for attachment needs in the postpartum.
Paper 3 evaluated the different aspects or functions of social
support during the third-trimester of pregnancy as potential
predictors of depression, anxiety, and stress levels during
pregnancy and at 4-6 months postpartum. The study results showed
that the perceived unavailability of self-esteem support
predicted high depression levels in the third-trimester, whereas
less perceived appraisal support predicted high stress and
anxiety levels during pregnancy. However, only total social
support score predicted high stress and depression levels
postpartum, whereas none of the social support variables
predicted postpartum anxiety.
Lastly, paper 4 examined a range of sociodemographic, pregnancy,
obstetric, and postnatal variables as potential risk factors for
postpartum depression, anxiety, and stress. The study results
showed that caesarean delivery was associated with high
postpartum depression, anxiety, and stress levels. In addition,
child sleep problems were related to high depression levels,
child health problems were related to high anxiety, a greater
number of recent stressful life events were related to high
stress levels, and maternal sleep problems were related to
greater PPD. However, these results became non-significant after
controlling for prenatal levels of maternal distress.
Nonetheless, the women who underwent caesarean delivery reported
higher prenatal stress, anxiety, and depression levels, relative
to women who did not undergo the procedure.
Taken together, the results of the four studies are likely to
have implications for the screening of women during the perinatal
period, and they may assist healthcare professionals who work
with expectant and new mothers. In particular, the study results
suggest that a woman’s relationships with her family and close
friends as well as with her spouse may be important in shaping
her psychological experiences including perinatal distress. In
addition, the totality of social support rather than any
particular aspect of social support appears to buffer against the
potential to experience maternal distress, although self-esteem
and appraisal support may be important. Finally, the women who
had a caesarean delivery were more likely to be distressed in the
third-trimester of pregnancy and also at 4-6 months postpartum.
Thus, the results point to the need to screen pregnant women for
mental health problems if they have a marked preference for
caesarean delivery.