“…Specifically, eleven studies ( 11 , 24 , 26 – 30 , 32 , 35 – 37 ) had <10,000 participants, while the remaining seven studies ( 21 – 23 , 25 , 31 , 33 , 34 ) had >10,000 participants. Furthermore, ten studies ( 21 , 23 , 26 , 28 – 31 , 34 , 36 , 37 ) were conducted in Asia, whereas seven studies ( 22 , 24 , 25 , 27 , 32 , 33 , 35 ) were carried out in Europe, one studies ( 11 ) were conducted in North America. Additionally, ten studies ( 11 , 23 , 24 , 27 – 30 , 34 , 35 , 37 ) utilized the Edinburgh Postnatal Depression Scale (EPDS) to measure PPD levels, two studies ( 22 , 25 ) deployed the SCL-90, two studies ( 21 , 31 ) adopted the 2010 LNHID, one study ( 26 ) used the CES-D, one study ( 36 ) employed the NHIS-NSC, one study ( 32 ) utilized the BDI, and one study ( 33 ) incorporated the HDR.…”