Table 1.

Description of the population of patients undergoing their first oocyte pick up (OPU) and collecting ≥ 5 cumulus oocyte complexes (COCs)

	First OPUs with ≥ 5 COCs N = 7962
Maternal age median (Q1, Q3)	37.0 (34, 40) years
Maternal karyotype 46, XX N (%) Mosaic or sex chromosome abnormality N (%) Structural abnormality N (%)	N = 7820, 98.2% N = 60, 0.8% N = 82, 1%
Maternal BMI median (Q1, Q3)	21.5 (19.7, 23.8) kg/m2
FSH median (Q1, Q3)	8.9 (6.4, 12.9) mIU/ml
AMH median (Q1, Q3)	1.9 (1.1, 2.8) ng/ml
Previous conception(s) No N (%) Yes N (%)	N = 2078, 26.1% N = 5884, 73.9%
Main cause of female infertility Idiopathic N (%) Endocrine ovulatory N (%) Tubal N (%) Endometriosis N (%) Advanced maternal age N (%) Diminished ovarian reserve N (%)	N = 1168, 14.7% N = 254, 3.2% N = 734, 9.2% N = 405, 5.1% N = 4978, 62.5% N = 423, 5.3%
Years of infertility median (Q1, Q3)	3 (1, 4) years
OS protocol FSH + antagonist N (%) Long N (%) Short flare-up N (%)	N = 6319, 79.4% N = 1109, 13.9% N = 534, 6.7%
OS duration median (Q1, Q3)	11 (10, 12) days
OS total gonadotrophins dose  < 1500 IU N (%) 1500–2500 IU N (%) 2500–3000 IU N (%) 3000–4000 IU N (%) 4000–5000 IU N (%)  > 5000 IU N (%)	N = 1097, 13.8% N = 2339, 29.4% N = 1585, 19.9% N = 1920, 24.1% N = 972, 12.2% N = 49, 0.6%
Trigger type Urinary-hCG N (%) GnRH-agonist N (%)	N = 4418, 55.5% N = 3544, 44.5%
Ovulation trigger to oocytes’ denudation interval median (Q1, Q3)	39.1 (38.2, 40.1) hours
Ovulation trigger to OPU interval median (Q1, Q3)	35.4 (35.2, 35.6) hours
OPU to oocytes’ denudation interval median (Q1, Q3)	3.6 (2.8, 4.6) hours
Follicles > 14 mm at ovulation trigger median (Q1, Q3)	9 (6, 14)
COCs median (Q1, Q3)	10 (7, 14)
Ratio COCs to follicles > 14 mm at ovulation trigger median (Q1, Q3)	1.13 (0.9, 1.4)

BMI body mass index, OS ovarian stimulation