Table 3.

Studies evaluating PRP and recurrent implantation failure

Author	Study design	Level of evidence	Intervention group (n)	Endometrial thickness pre-PRP	Endometrial thickness post PRP	Implantation rate (%)	p value	Clinical pregnancy rate (%)	p value
Farimani et al. (2017) [8]	Case report	-	1	-	-	-	-	100	-
Mehrafza et al. (2019) [35]	Retrospective cohort	3	67	-	-	17.2	0.057	40.3	0.025
Coksuer et al. (2019) [5]	Retrospective cohort	3	34	<7	10 (8–14)	-	-	50	0.042
Nazari et al. (2019) [9]	RCT	2	97	-	-	-	0.009	44.89	0.003
Sfakianoudis et al. (2019) [36]	Case report	-	1	-	-	-	-	100	-
Aghajanzadeh et al. (2020) [37]	Cohort	3	30	<7	7.79±1.05	6.7	0.12	3.3	1
Zargar et al. (2021) [38]	Prospective randomized	3	40	-	-	-	-	12.5	NS