Table 1. Description of reviewed articles.

BMI, body mass index; OB, obstetrics

Title	Authors	Year Published	Type of Study	Country of Study Origin	Number of Participants Analyzed (N)	Mode and Timing of Maternal BMI Reported	Scales/Metrics Used	When were Depressive Symptoms Measured	% of Obese in Trial
The Association Between Pre-Pregnancy Body Mass Index, Perinatal Depression and Maternal Vitamin D Status: Findings from an Australian Cohort Study	Jani et al. [21]	2020	Retrospective cross-sectional cohort study	Australia	16,528	Measured height and weight recorded at first OB visit (12-14 weeks’ gestation)	Edinburgh Postnatal Depression Scale	Mid pregnancy (12-14 weeks’ gestation)	19.8% (3,274)
Maternal Early Pregnancy Obesity and Depressive Symptoms during and after Pregnancy	Kumpulainen et al. [22]	2018	Secondary analysis of prospective cohort study	Finland	3,234	Measured height and weight recorded at first OB visit (7-10 weeks) (average 8 weeks 4 days’ gestation)	Center for Epidemiological Studies Depression Scale	Biweekly starting 12+0 to 13+6 gestation until delivery AND at 2.4 and/or 28.2 weeks after pregnancy	13% (430)
Postpartum Depressive Symptoms: Gestational Weight Gain as a Risk Factor for Adolescents Who Are Overweight or Obese	Cunningham et al. [25]	2018	Prospective secondary analysis of a randomized controlled trial	USA	505	Self-reported pre-pregnancy height and weight	Center for Epidemiologic Studies Depression Scale	Second trimester, third trimester, and 6 and 12 months postpartum	17.8% (90)
Perinatal Weight and Risk of Prenatal and Postpartum Depressive Symptoms	Ertel et al. [19]	2017	Prospective cohort study	USA	Pregnant: 2,112; postpartum: 1,686	Self-reported pre-pregnancy height and weight	Edinburgh Postnatal Depression Scale	Mid pregnancy (median: 27.8 weeks’ gestation) and 6 months postpartum	16% (331)
Obesity and the Association with Maternal Mental Health Symptoms	Ruhstaller et al. [23]	2017	Secondary analysis of prospective cohort study	USA	1,010	Self-reported height, weight measured at their first prenatal visit (16-20 weeks)	Center for Epidemiologic Studies Depression scale	Mid pregnancy (16-20 weeks’ gestation)	35% obese (355), Further classified: Class 1: 159 Class II: 102 Class III: 94
Body Image Mediates the Depressive Effects of Weight Gain in New Mothers, Particularly for Women Already Obese: Evidence from the Norwegian Mother and Child Cohort Study	Han et al. [24]	2016	Secondary analysis of a prospective cohort study	USA	39,915	Self-reported pre-pregnancy height and weight	Hopkins Symptom Checklist (SCL-8)	17 weeks’ gestation (time 0), and 18 months (time 1) and 36 months (time 2) postpartum	9.3% (3,731)
Associations of Mood Symptoms with Ante- and Postnatal Weight Change in Obese Pregnancy Are Not Mediated by Cortisol	Mina et al. [20]	2015	Prospective cohort study	United Kingdom	357	Weighed at weeks 17, 28, and 36 of pregnancy and 3 months postpartum	Psychosocial risk factor assessment, satisfaction with Life Scale, General Health Questionnaire, Hospital Anxiety and Depression Scale, and State-Trait Anxiety Index	17 weeks’ gestation, 28 weeks’ gestation, and at the postpartum visit	62% (222)