*Table 2. Clinical pregnancy rate and delivery rate in fresh autologous IVF and ICSI cycles stratified according to the age of women in 2021.
Age of
women		 Oocyte
retrievals		 Oocyte
retrievals*		 Oocyte
retrievals**		 Clinical
Pregnancies
(CPR/OR*)		 Deliveries
(DR/OR**)		 PR
(95% CI);
p-value		 Embryo
transfers***		 Deliveries
(DR/ET***)		 PR (95% CI);
p-value
≤30 3,825 1336 1300 450
(33.7%)		 352
(27.1%)		 1.00 (Ref.) 954 352
(36.9%)		 1.00 (Ref.)
31-33 5,941 2381 2322 756
(31.8%)		 591
(25.5%)		 0.94 (0.84; 1.05); 0.284 1,660 591
(35.6%)		 0.96 (0.87; 1.07); 0.506
34-36 10,344 4429 4347 1,180
(26.6%)		 928
(21.3%)		 0.79 (0.71; 0.88); <0.001 2,905 928
(31.9%)		 0.87 (0.78; 0.96); 0.004
37-39 13,787 6375 6287 1,171
(18.4%)		 849
(13.5%)		 0.50 (0.45; 0.56); <0.001 3,481 849
(24.4%)		 0.66 (0.60; 0.73); <0.001
40-42 13,003 6857 6805 626
(9.1)		 399
(5.9%)		 0.22 (0.19; 0.25); <0.001 2,912 399
(13.7%)		 0.37 (0.33; 0.42); <0.001
≥43 5,593 3476 3471 136
(3.9%)		 82
(2.4%)		 0.09 (0.07; 0.11); <0.001 980 82
(8.4%)		 0.23 (0.18; 0.28); <0.001
Total 52,493 24,854 24,532 4,319
(17.4%)		 3,201
(13.0%)		 - 12,892 3,201
(24.8%)		 -

After comparing, DR shows no difference between IVF/ICSI we group them together to analyze only the effect of age.* Oocyte retrievals (OR) excludes cases of total embryo freezing.
** OR excluding cases of total embryo freezing and pregnancies with loss to follow-up (LFU).
*** Embryo transfers (ET) excluding pregnancies with LFU.
CPR/OR*: clinical pregnancy rate per oocyte retrieval; DR/OR**: delivery rate per oocyte retrieval excluding LFU; DR/ET***: delivery rate per transfer excluding LFU