Table 1.

Studies’ general characteristics as obtained following data extraction regarding FPS and LPS respectively

Studies	Type of study	Infertility etiology	Number of patients
			FPS	LPS
Kuang et al. 2014 [6]	Prospective	Mixed Populationa	38	30
Ubaldi et al. 2016 [9]	Prospective	Mixed Populationa	43	43
Liu et al. 2017 [20]	Retrospective	Mixed Populationa	116	116
Zhang et al. 2017 [21]	Retrospective	PORb	153	153
Rashtian et al. 2017 [7]	Retrospective	Mixed Populationa	69	69
Jin et al. 2018 [19]	Retrospective	PORb	72	76
Vaiarelli et al. 2018 [10]	Prospective	Mixed Populationa	353	336
Zhang et al. 2018 [22]	Retrospective	PORb	61	61
Madani et al., 2019 [16]	Prospective	PORb	121	104

FPS follicular phase stimulation, LPS luteal phase stimulation

^aMixed population including patients with a prognosis of poor ovarian response

^bPOR population including patients diagnosed with POR according to the Bologna criteria