Table 1. Comparison of results of controlled ovarian stimulation (initiated cycles) for patients with AMH <1.2 ng/mL between the GnRH agonist (GnRH-a) and antagonist (GnRH-ant) protocols.

Women Age	≤35		36~39		≥40
Criteria	POSEIDON group 3		POSEIDON group 4		POSEIDON group 4, Bologna criteria
Group	PG3		PG4A		PG4B
Protocols	GnRH-a	GnRH-ant	GnRH-a	GnRH-ant	GnRH-a	GnRH-ant
Initiated ART cycles	283	54	352	73	311	160
Age (years)	33.0±1.9	33.4±1.6	37.6±1.1	37.4±1.2	42.3±2.2	42.6±1.8
Height (cm)	159.2±5.0	159.6±5.4	159.5±5.5	159.8±5.7	159.3±5.3	159.3±5.5
Weight (Kg)	55.4±8.1	55.6±9.1	56.3±9.0	55.9±10.3	57.2±8.0	56.9±7.3
BMI (Kg/M2)	21.9±3.1	21.7±2.7	22.1±3.3	21.9±3.5	22.5±3.1	22.5±2.8
Basal FSH (IU/L)	10.2±5.5	9.7±5.5	10.9±6.5	9.6±5.4	11.5±6.4	10.9±6.0
AMH (ng/mL)	0.65±0.24	0.58±0.24	0.61±0.26	0.57±0.28	0.57±0.26	0.54±0.26
E2 on hCG day (pg/mL)	677±468	711±413	637±506	685±450	533±447	575±452
P4 on hCG day (ng/mL)	1.00±2.58	0.89±0.75	1.02±4.65	1.33±3.08	1.23±6.15	1.26±2.85
LH on hCG day (IU/L)	2.63±3.07a	3.71±3.58a	2.79±3.85	3.74±4.89	4.36±7.98b	6.61±7.81b
rFSH total dose (IU)	3298±670c	3018±939 c	3533±938	3324±946	4319±1075d	3937±1054d
ET cancellation (%)	30 (10.6) e	12 (22.2) e	67 (19.0)	18 (24.7)	91 (29.3)	41 (25.9)
No oocyte retrieved (%)	9(3.2)	3 (5.6)	17 (4.8)	6 (8.2)	29 (9.3)	19(9.9)
No mature oocytes (%)	6 (2.1)	4 (7.4)	16 (4.5)	1 (1.4)	17 (5.5)	7(4.3)
No embryos (%)	15 (5.3)	5 (9.3)	34 (9.7)	12 (16.4)	45 (14.5)	15(9.9)
ET rate (%)	253(89.4)	42 (77.8)	285(81.0)	55 (75.3)	220 (70.7)	119 (74.1)

Data are presented as mean ± SD or number (percentage). For the percentage, the numerator is the number of cycles with ET cancellation, no oocyte retrieved, no mature oocytes, or no embryos; and the denominator is the number of initiated cycles.

^a, p = 0.021;

^b, p = 0.003;

^c, p = 0.009;

^d, p<0.001 by Student’s t test; and

^e, p = 0.018 by the chi-squared test.