Table 1 Characteristic of the participants

Age category

≤ 29^a

30–34^b

35–37^c

38–40^d

41–43^e

≥ 44^f

Donor age: 18–32^g

BMI: 23.6 ± 

Size (n)

45

112

144

206

167

60

236

Recipient age (years)^h

26.4 ± 2.7^b,c,d,e,f,g

32.4 ± 1.3^a,c,d,e,f,g

36.1 ± 0.7^a,b,d,e,f,g

39.0 ± 0.8^a,b,c,e,f,g

41.8 ± 0.8^a,b,c,d,f,g

45.1 ± 1.6^a,b,c,d,e,g

42.0 ± 4.6^a,b,c,d,f

Recipient BMI (kg/m²)

23.6 ± 3.5

25.0 ± 4.1

24.7 ± 4.0

24.4 ± 3.6

24.8 ± 4.0

25.2 ± 3.5

25.3 ± 3.9

Oocyte collected (n)

18.1 ± 9.1^d,e,f

16.7 ± 9.3^d,e,f

15.6 ± 8.3^d,e,f

11.8 ± 6.4^a,b,c,g

11.3 ± 6.9^a,b,c,g

8.8 ± 6.6^a,b,c,g

15.7 ± 6.4^d,e,f

Oocyte fertilized (n)

13.4 ± 6.4^d,e,f

12.6 ± 7.9^d,e,f

11.5 ± 6.9^d,e,f

8.7 ± 5.0^a,b,c,g

8.3 ± 5.6^a,b,c,g

6.5 ± 4.8^a,b,c,g

11.2 ± 5.0^d,e,f

Embryos (n)

8.3 ± 6.1^d,e,f

8.6 ± 7.3^d,e,f,g

7.2 ± 5.7^d,e,f

5.4 ± 4.0^a,b,c

5.3 ± 4.3^a,b,c

4.2 ± 3.6^a,b,c,g

6.5 ± 4.3^b,f

Fertilization rate (%)

73.2 ± 17.3

69.8 ± 18.3

71.4 ± 19.2

69.5 ± 18.4

68.5 ± 21.9

75.2 ± 22.2

69.0 ± 17.4

Aneuploidy rate (%)

27.5 ± 30.9^d,e,f

37.5 ± 30.7^d,e,f

37.6 ± 32.5^d,e,f

56.9 ± 35.4^a,b,c,e,f,g

67.9 ± 36.5^a,b,c,d,f,g

87.5 ± 24.9^a,b,c,d,e,g

27.5 ± 26.9^d,e,f

Cycles with no euploid embryos (%)

1.8^e,f

4.6^e,f

7.3^d,e,f

26.9^b,c,e,f,g

34.7^a,b,c,d,f,g

20.1^a,b,c,d,e,g

4.6^d,e,f