TABLE 2.

The relationship between the length of time from hCG administration to completion of ICSI and oocyte spindle visibility.

	Time from hCG administration to completion of ICSI (hours) a
	<36	36.0–36.9	37.0–37.9	38.0–38.9	39.0–39.9	40.0–40.9	41.0–41.9	42.0–42.9	≥43
Total (hCG‐ICSI interval: 40.0 ± 1.6 h)
Oocyte	114	201	313	898	1336	1175	979	521	200
Visible	68	146	240	742	1099	1032	862	467	173
%	59.6	72.6	76.7*	82.6**,§	82.3**,§	87.8**,§§,††,#,¶¶	88.0**,§§,††,#,¶¶	89.6**,§§,††,##,¶¶	86.5**,§
PPOS (hCG‐ICSI interval b : 40.1 ± 1.4 h)
Oocyte	3	11	89	362	443	417	364	162	33
Visible	3	11	74	297	356	379	325	138	27
%	100.0	100.0	83.1	82.0	80.4	90.9	89.3	85.2	81.8
Long (hCG‐ICSI interval b : 40.5 ± 1.5 h)x
Oocyte	0	0	3	69	119	57	65	63	20
Visible	0	0	1	49	99	52	56	63	15
%	–	–	33.3	71.0	83.2	91.2	86.2	100.0†,##,¶¶,‡,x	75.0
Short (hCG‐ICSI interval b : 40.4 ± 1.5 h)x
Oocyte	5	9	39	162	324	365	252	138	77
Visible	1	7	26	148	273	316	224	126	69
%	20.0	77.8	66.7	91.4*,††,x,y	84.3	86.6*	88.9*,†	91.3*,†	89.6*
GnRH antagonist (hCG‐ICSI interval b : 39.4 ± 2.1 h)x,y,z
Oocyte	106	181	182	305	450	336	298	158	70
Visible	64	128	139	248	371	285	257	140	62
%	60.4	70.7	76.4	81.3**,z	82.4**,§	84.8**,§§	86.2**,§§	88.6**,§§,y	88.6**

Abbreviations: GnRH, gonadotropin‐releasing hormone; hCG‐ICSI interval, interval from human chorionic gonadotropin administration to the completion of intracytoplasmic sperm injection; PPOS, progestin‐primed ovarian stimulation.

**p < 0.01, *p < 0.05, each group vs. <36 h. ^§§ p < 0.01, ^§ p < 0.05, each group vs. 36‐36.9 h. ^†† p < 0.01, ^† p < 0.05, each group vs. 37–37.9 h. ^## p < 0.01, ^# p < 0.05, each group vs. 38–38.9 h. ^¶¶ p < 0.01, each group vs. 39–39.9 h. ^‡ p < 0.05, each group vs. ≥43 h. ^x p < 0.01, each protocol vs. PPOS protocol. ^y p < 0.01 each protocol vs. long protocol. ^z p < 0.05 each protocol vs. short protocol.

^a Holm test.

^b Steel‐Dwass.