“…Sample sizes varied from 54 participants in a follow-up of a previous randomized trial [ 51 ] to 12,386 couples in a study with findings on both maternal and paternal depression [ 53 ]. Most of the included studies [ 38 – 41 , 43 , 44 , 47 , 50 , 51 , 58 – 60 , 62 , 63 , 68 ] in the mid or late pregnancy, four [ 45 , 54 – 56 ] started in early pregnancy, and ten studies [ 42 , 46 , 48 , 49 , 53 , 61 , 64 , 65 , 67 , 70 ] started after birth. Women were on average aged between 18 and 40 years old.…”