The COVID-19 pandemic resulted in global physical distancing restrictions and lockdown orders. Despite the clear documentation of increased mental distress amongst adult populations during the pandemic, there is limited evidence about the mental health challenges of people in the perinatal period (pregnancy, birth and postpartum). The aim of this review is to summarise the qualitative research about women's lived experience and emotional wellbeing during the COVID-19 pandemic. A comprehensive search strategy was developed. Twenty peer-reviewed qualitative research articles published in English from January 1, 2020, to December 15, 2021, were included. Data synthesis outlined the evidence from common themes in a narrative format. Themes during pregnancy included: (1) information seeking: anxiety and fear; (2) experiencing isolation and disruptions to my social support; (3) ‘Going it alone’ in pregnancy care; (4) anticipatory grieving and despair; (5) finding ‘silver linings’ in social restrictions. One key theme during birth was “birthing in a crisis”. Themes during postpartum included: (1) isolating ‘Early motherhood is much like lockdown’; (2) breastfeeding: triumphs and tribulations; (3) facing disruptions during postpartum care; (4) 'Affecting us for years to come' - COVID-19 was not the only trauma; (5) ‘silver linings’ during postpartum care. This review provides important insights into how experiences of isolation, decreased social support and adaptions to maternity services affect women's mental health. Maternity services should consider how perinatal mental health support may be integrated into the care of women who may still be required to isolate or have reduced visitors during their perinatal care. The restrictions and disruptions to maternity care due to the COVID-19 pandemic were likely to impact the mental health of women in the perinatal period (pregnancy, birth and postpartum). What is already known is that public health measures due to COVID-19 increased the prevalence of common perinatal mental disorders (CPMDs) and exacerbated common risk factors for CPMDs (i.e., poor social support). What this paper adds: The qualitative research with women in the perinatal period during the pandemic provides unique insights into how these events impacted perinatal mental and emotional health. In particular, the ways that global physical distancing measures and maternity care adaptations contributed to women's feelings of distress, isolation, and depression/despair. Silver linings such as more uninterrupted time with immediate family were also identified.

Selenium plays a role in antioxidant status and, together with iodine, in thyroid function. Iodine deficiency exists in New Zealand during pregnancy and lactation, and selenium deficiency may further affect thyroid function. This study investigated selenium intakes of pregnant and lactating women, in Palmerston North, in the North Island of New Zealand. Dietary intake was estimated using three repeated 24-h dietary recalls. Dietary intake in pregnancy was also estimated from 24-h urinary excretion of selenium. Selenium concentrations were determined in urine and breastmilk using inductively-coupled plasma mass spectrometry. Median selenium intakes based on dietary data were 51 (39, 65) μg/day in pregnancy and 51 (36, 80) μg/day in lactation, with 61% and 68% below estimated average requirement (EAR). Median daily selenium intake in pregnancy based on urinary excretion was 49 (40, 60) µg/day, with 59% below EAR. Median selenium concentration in breastmilk was 11 (10, 13) µg/L and estimated median selenium intake for infants was 9 (8, 10) µg/day, with 91% below the Adequate Intake of 12 μg/day. These pregnant and breastfeeding women were at risk of dietary selenium inadequacy. Further research is required to assess selenium status in relation to thyroid function and health in this group.

To alleviate the re-emergence of iodine deficiency in New Zealand, two strategies, the mandatory fortification of bread with iodised salt (2009) and a government-subsidised iodine supplement for breast-feeding women (2010), were introduced. Few studies have investigated mother and infant iodine status during the first postpartum year; this study aimed to describe iodine status of mothers and infants at 3, 6 and 12 months postpartum (3MPP, 6MPP and 12MPP, respectively). Partitioning of iodine excretion between urine and breast milk of exclusive breast-feeding (EBF) women at 3MPP was determined. In total, eighty-seven mother–infant pairs participated in the study. Maternal and infant spot urinary iodine concentration (UIC) and breast milk iodine concentration (BMIC) were determined. The percentage of women who took iodine-containing supplements decreased from 46 % at 3MPP to 6 % at 12MPP. Maternal median UIC (MUIC) at 3MPP (82 (46, 157) µg/l), 6MPP (85 (43, 134) µg/l) and 12MPP (95 (51, 169) µg/l) were <100 µg/l. The use of iodine-containing supplements increased MUIC and BMIC only at 3MPP. Median BMIC at all time points were below 75 µg/l. Infant MUIC at 3MPP (115 (69, 182) µg/l) and 6MPP (120 (60, 196) µg/l) were below 125 µg/l. Among EBF women at 3MPP, an increased partitioning of iodine into breast milk (highest proportion 60 %) was shown at lower iodine intakes, along with a reduced fractional iodine excretion in urine (lowest proportion 40 %), indicating a protective mechanism for breastfed infants’ iodine status. In conclusion, this cohort of postpartum women was iodine-deficient. Iodine status of their breastfed infants was suboptimal. Lactating women who do not consume iodine-rich foods and those who become pregnant again should take iodine-containing supplements.

Iodine and selenium are required for thyroid function. This study investigated iodine and selenium intakes in healthy, women aged 50–70 years (n = 97) from three cities in the North Island of New Zealand, after mandatory fortification of bread with iodised salt. Iodine and selenium concentrations were determined in 24-h urine samples; daily intakes were extrapolated from amounts in urine (90% and 55% of daily intake, respectively). Three day diet diaries (3DDD) also estimated selenium and iodine (excluding iodised salt) intake. Median urinary iodine concentration (UIC) was 57 (41, 78) µg/L, indicating mild iodine deficiency. Estimated median iodine intake based on urine was 138 (100, 172) µg/day, below Recommended Dietary Intake (RDI) (150 µg/day) with 25% below Estimated Average Requirement (EAR) (100 µg/day). Estimated median selenium intake was 50 (36, 71) µg/day based on urine and 45 (36, 68) µg/day using 3DDD, below RDI (60 µg/day) with 49%–55% below EAR (50 µg/day). Median bread intakes were low at 1.8 (1.1, 2.7) serves/day; 25% consumed ≤1 serve/day. Although population iodine intakes improved following mandatory fortification, some had low intakes. Selenium intakes remain low. Further research should investigate thyroid function of low consumers of iodine fortified bread and/or selenium in New Zealand.