Table 1.

Maternity Blues: definitions over time.

Authors	Year	Definition	Peak Incidence
Moloney [23]	1952	Third-day depression following childbirth	Third post-partum day
Hamilton [24]	1962	Transient mood disorder occurring in the first days after delivery	From third to fifth post-partum day
Yalom et al. [25]	1968	Transient benign mild depression occurring post-partum (also called post-partum blues syndrome)	Fifth post-partum day.
Pitt [26]	1973	Transitory depression and tearfulness, also known as mother’s blues or third-, fourth-, or tenth-day blues or the transitory syndrome	Third or fourth post-partum day
Stein [27]	1982	Transient and common condition of dysphoria of the early puerperium	Third or fourth post-partum day
Kennerley et al. [28]	1986	Brief and benign affective disorder occurring soon after childbirth	First week after delivery
Kendell et al. [29]	1981	Shortlived lability of mood in the early days after delivery	Fifth post-partum day
Beck [30]	1991	Transitory phenomenon of mood changes consisting of depression symptoms	Within 10 days after delivery
Henshaw et al. [13]	2004	Dysphoric episodes (also called postnatal blues), with symptoms resembling depression but having a shorter duration	From third to fifth post-partum day
Pop et al. [21]	2015	Period of intense short-lasting mood changes, commonly described as ‘the blues’	Third-fifth post-partum day
Ntaouti et al. [10]	2020	Transient physiologic and psychological disorder with potential symptoms of depression and confusion	Third post-partum day