Table 1.

Characteristics of the included studies.

References	Study location	Sample size	Age	Participant characteristics	Intervention content	Outcome instrument	Intervention frequency, times per week	Intervention period, week	Single intervention duration, min	Homework per day, min
Dimidjian et al. (2016)	America	I:24	≥18	Pregnant women with history of depression	MBCT	EPDS	1	8	120	Unknown
		C:31
Zemestani and Nikoo (2019)	Australia	I:19	≥18	Pregnant women	MBCT	BDI-II	1	3	60	30
		C:19
Duncan et al. (2017)	America	I:15	Unknown	Third trimester of pregnancy	MBCP	CES-D	2 days and a night	3 days	360	0
		C:13
Yang et al. (2019)	China	I:62	≥18	24–30 weeks' gestation	Mindfulness	PHQ-9	0.5	8	45–50	20
		C:61
Yazdanimehr et al. (2016)	Iran	I:30	20–31	Pregnant women who had a gestational age of 1–6 months	MICBT	EPDS	1	8	90	Unknown
		C:33
Pan et al. (2019)	China	I:39	≥20	Singleton pregnancy between 13 and 28 weeks	MBCP	EPDS	1	8	180	30
		C:35
Lönnberg et al. (2019)	Sweden	I:75	27–36	First pregnant and gestational 15–22 weeks	MBCP	EPDS	8	8	135	30
		C:89
Matvienko-Sikar et al. (2016)	Ireland	I:24	27–40	Singleton pregnancy between 10 and 22 weeks	Mindfulness	EPDS	4	3	6	Unknown
		C:12
Woolhouse et al. (2014)	Australia	I:13	18–50	Between 10 and 34 weeks gestation	Mindfulness	CES-D	1	6	15–20	6–10 min/ 3–4 day
		C:10
Woolhouse et al. (2014)	Australia	I:13	18–50	Between 10 and 34 weeks gestation	Mindfulness	DASS	1	6	15–20	6–10 min/ 3–4 day
		C:10
Vieten and Astin (2008)	America	I:13	30–37	Between 12 and 30 weeks gestation	Mindfulness	PSS	1	8	120	60
		C:18

I, Intervention group; C, Control group.