. 2024 May 15;15:1338683. doi: 10.3389/fendo.2024.1338683

Table 2.

Ovarian stimulation in the patients in each group.

Items	Group A	Group B	Group C	Group D	χ2/F	P value
No. of patients	3038	3228	3436	3172
dosage of Gn (U)	1875 (1425–2400)	2100 (1650–2700) ^a	2325 (1800–2850) ^ab	2625 (2100–3150) ^abc	1198.753	0.000
duration of Gn (d)	10.0 ± 1.6	10.1 ± 1.6	10.2 ± 1.5^a	10.3 ± 1.7^ab	13.600	0.000
LH on hCG injection day (IU/L)	1.4 (0.9–2.2)	1.8 (1.1–2.8) ^a	1.9 (1.1–3.1) ^ab	2.1 (1.2–3.6) ^abc	454.564	0.000
E₂ on hCG injection day (pmol/L)	6834 (5110–9382)	6953 (5167–9963)^a	7164 (5270–10235) ^ab	6498 (4574–9276) ^abc	90.621	0.000
P on hCG injection day (nom/L)	1.4 (1.1–1.7)	2.1 (1.6–2.5) ^a	2.6 (2.0–3.3) ^ab	3.2 (2.4–4.9) ^abc	5280.862	0.000
P/E₂ ratio	0.23 (0.17–0.31)	0.33 (0.24–0.44) ^a	0.40 (0.31–0.53) ^ab	0.55 (0.42–0.74) ^abc	4695.487	0.000
P/O ratio	0.11 (0.09–0.13)	0.18 (0.16–0.20) ^a	0.26 (0.24–0.29) ^ab	0.43 (0.37–0.54) ^abc	12072.402	0.000
Endometrial thickness on hCG day(cm)	10.8 ± 1.4	10.7 ± 1.4	10.6 ± 1.4^ab	10.6 ± 1.5^ab	18.199	0.000
No. of oocytes retrieved	13 (11–16)	12 (9–14) ^a	10 (8–13) ^ab	7 (5–9) ^abc	3928.658	0.000
MII oocyte rate (%)	76.3	76.6	79.4 ^ab	81.0^ab	118.840	0.000*
ICSI rate (%)	43.9	41.3	41.5	38.4 ^abc	19.611	0.000*
Available embryo number	4 (3–7)	3 (2–5) ^a	3 (2–5) ^ab	2 (2–3) ^abc	988.474	0.000
Ratio of available embryos to retrieved oocytes (%)	35.9	35.8	36.7	40.9^abc	106.512	0.000

a indicates P<0.05 compared with Group A; b indicates P<0.05 compared with Group B; c indicates P<0.05 compared with Group C. * indicates a significant difference between the two groups (P<0.008).