Table 2 Effect of OPU-DN time on oocyte maturation and ICSI outcome

Velde et al. (1998) [21]

1–2 VS 5–6

N

N

N

ND

ND

ND

ND

Yanagida et al. (1998) [22]

1–3 vs 3–5 vs 5–7 vs 7–9 vs 9–11

N

N

Y

ND

ND

N

ND

Rienzi et al. (1998) [23]

≤3 h vs 3–6 vs 6–9 vs 9–12

N

Y

Y

ND

N

N

ND

Hassan et al. (2001) [2]

0 vs 4

Y

Y

ND

N

ND

N

ND

Jacobs et al. (2001) [25]

0–2 vs 2–3 vs 3–4 vs > 4

N

N

N

ND

N

N

ND

Ho et al. (2003) [26]

< 2.5 vs 2.5–3.5 vs 3.5–4.5 vs 4.5–5.5 vs ≥5.5

Y

N

N

ND

ND

N

ND

Isiklar et al. (2004) [15]

0 vs 2–4

Y

Y

Y

ND

N

N

ND

Aletebi (2011) [4]

0 vs 1 vs 2

Y

Y

ND

ND

ND

N

ND

Patrat et al. (2012) [17]

0 vs 0.5 vs 1 vs 1.5 vs 2 vs 2.5 vs 3

N

Y

N

ND

Y

N

N

Esbert et al. (2013) [28]

2 vs 4

Y

N

N

ND

N

N

ND

Garor et al. (2015) [5]

< 2 vs > 2

ND

N

ND

ND

ND

N

ND

Terasawa et al. (2016) [29]

< 2 vs 2–3 vs > 3

ND

Y

ND

ND

ND

N

ND

Ishikawa et al. (2016) [30]

0 vs 2

N

N

Y

N

ND

ND

ND

Bárcena et al. (2016) [19]

3 h by deciles

ND

N

N

ND

ND

N

N

Pujol et al. (2018) [20]

2.12 h by deciles

ND

ND

ND

ND

ND

N

N

Mizuno et al. (2018) [16]

0 vs 2

N

N

Y

N

ND

N

N

Naji et al. (2018) [32]

0 vs 0–2 vs 2–5

N

N

ND

ND

N

N

N

Azizi et al. (2020) [34]

< 2 vs > 2

N

N

ND

ND

ND

N

ND