Effect of body mass index on pregnancy outcomes in young women with low-prognosis POSEIDON criteria after in vitro fertilization/intracytoplasmic sperm injection

Table 2 Endocrine characteristics and IVF outcomes

	Underweight n = 518	Normal weight n = 3447	Overweight n = 1360	Obese n = 656	P
Starting dosage of gonadotropin (IU)	238.88 ± 82.13	233.17 ± 80.33	224.33 ± 77.33	220.2 ± 80.22	< 0.001^b,c,d,e*
Duration of ovarian stimulation (days)	10.94 ± 2.45	11.12 ± 2.47	11.33 ± 2.6	11.76 ± 2.88	0.017^b,c,d,e,f
Total dosage of gonadotropin (IU)	2957.57 ± 1335.76	2964.63 ± 1251.04	2924.7 ± 1204.55	3065.31 ± 1355.21	0.137
E2 values on the trigger day (pmol/L)	6701.93 ± 3884.54	5771.36 ± 3180.94	4988.99 ± 2903.51	4737.87 ± 2836.25	< 0.001^a,b,c,d,e
P values on the trigger day (nmol/L)	2.31 ± 1.34	2.12 ± 4.92	1.72 ± 0.95	1.55 ± 0.78	< 0.001^b,c,d,e
LH values on the trigger day (mIU/ml)	2.32 ± 4.67	2.35 ± 11.22	2.19 ± 2.78	2.29 ± 2.69	0.952
No. of oocytes retrieved	6.18 ± 2.32	6.24 ± 2.26	6.11 ± 2.24	5.86 ± 2.39	0.001^c,e,f
No. of 2PN	3.69 ± 2.01	3.67 ± 2.07	3.58 ± 2.06	3.32 ± 2.03	0.001^c,e,f
No. of high- quality embryos	2.52 ± 1.98	2.56 ± 1.95	2.57 ± 1.93	2.38 ± 1.81	0.169

^*:Data are shown as the number of mean ± SD. SD, standard deviation; E2, estradiol; LH, luteinizing hormone; P, progesterone; PN, pronucleus. a P < 0.05, underweight vs. normal weight; b P < 0.05, underweight vs. overweight; c P < 0.05, underweight vs. obese; d P < 0.05, normal weight vs. overweight; e P < 0.05, normal weight vs. obese; f P < 0.05, overweight vs. obese

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