Table 2 The characteristics of the IVF/ICSI treatments and outcomes of the women in the different AMH and age groups

Stimulation protocol

GnRH agonist

34.0 (110/324) ^a

51.1 (381/746) ^b

51.8 (239/461) ^b

24.3 (66/272) ^a

47.2 (162/343) ^b

49.0 (49/100) ^b

GnRH antagonist

59.9 (194/324) ^a

48.5 (362/746) ^b

47.9 (221/461) ^b

68.8 (187/272) ^a

51.6 (177/343) ^b

50.0 (50/100) ^b

Others

6.2 (20/324) ^a

0.4 (3/746) ^b

0.2 (1/461) ^b

7.0 (19/272) ^a

1.2 (4/343) ^b

1.0 (1/100) ^{a, b}

Fertilization method

IVF

58.0 (188/324) ^a

49.7 (371/746) ^b

44.3 (204/461) ^b

58.1 (158/272)

53.1 (182/343)

51.0 (51/100)

ICSI

41.7 (135/324) ^a,

47.7 (356/746) ^{a, b}

50.5 (233/461) ^a

41.5 (113/272)

46.1 (158/343)

45.0 (45/100)

IVF + ICSI

0.3 (1/324) ^a

2.5 (19/746) ^b

5.2 (24/461) ^c

0.4 (1/272) ^a

0.9 (3/343) ^{a, b}

4.0 (4/100) ^b

Number of oocytes retrieved

7 (1–25) ^a

12 (1–28) ^b

15 (1–34) ^c

5 (1–23) ^a

10 (1–25) ^b

13 (4–28) ^c

Number of mature oocytes

5 (1–21) ^a

10 (1–26) ^b

12 (1–29) ^c

4 (1–19) ^a

9 (1–23) ^b

11 (2–25) ^c

Rate of MII (%)

84.9 (1922/2263)

83.1 (7516/9046)

83.1 (5690/6845)

86.9 (1351/1554) ^a

84.6 (3052/3609) ^{a, b}

83.6 (1174/1405) ^b

Number of 2PN

4 (1–17) ^a

7 (1–25) ^b

9 (1–25) ^c

3 (0–17) ^a

6 (1–16) ^b

8 (2–19) ^c

Normal fertilization rate [% (n/N)]

70.9 (1454/2052)

70.7 (5734/8105)

70.7 (4298/6078)

71.1 (1011/1422)

68.7 (2248/3274)

70.1 (871/1242)

Normal cleavages of 2PN

4 (0–17) ^a

7 (0–25) ^b

9 (1–24) ^c

3 (0–17) ^a

6 (1–16) ^b

8 (2–19) ^c

Cleavage rate (%)

98.0 (1425/1454)

97.6 (5596/5734)

97.8 (4203/4298)

98.7 (998/1011)

98.8 (2220/2248)

97.9 (853/871)

Number of D3 high-quality embryos

1 (0–8) ^a

2 (0–16) ^b

3 (0–15) ^c

1 (0–14) ^a

2 (0–11) ^b

3 (0–16) ^c

High-quality embryo rate [% (n/N)]

39.3 (560/1425) ^{a, b}

36.7 (2053/5596) ^b

39.6 (1664/4203) ^a

40.1 (400/998)

37.8 (840/2220)

38.7 (330/853)

Number of embryos transferred

2 (1–2) ^a

2 (1–2) ^b

1 (1–2) ^c

2 (1–3)

2 (1–3)

2 (1–3)

Number of embryos implanted

0 (0–2)

0 (0–2)

0 (0–2)

0 (0–2)

0 (0–2)

0 (0–2)

Implantation rate [% (n/N)]

34.5 (193/560)

35.3 (434/1230)

37.5 (247/658)

22.7 (107/471)

28.3 (167/590)

23.9 (38/159)

Pregnancy rate [% (n/N)]

46.9 (152/324) ^a

46.0 (343/746) ^a

44.7 (206/461) ^b

34.2 (93/272) ^a

43.1 (148/343) ^b

33.0 (33/100) ^a

Biochemical pregnancy rate [% (n/N)]

4.6 (15/324) ^a

4.7 (35/746) ^b

3.5 (16/461) ^a

3.3 (9/272)

5.2 (18/343)

7.0 (7/100)

Early miscarriage rate [% (n/N)]

5.6 (18/324) ^a

2.5 (19/746) ^b

5.4 (25/461) ^a

6.6 (18/272)

8.5 (29/343)

8.0 (8/100)

Ectopic pregnancy rate [% (n/N)]

2.2 (7/324) ^a

2.1 (16/746) ^b

1.3 (6/461) ^a

1.8 (5/272)

2.0 (7/343)

1.0 (1/100)

Live birth rate [% (n/N)]

37.3 (121/324)

39.9 (298/746)

36.0 (166/461)

22.8 (62/272)

30.3 (104/343)

24.0 (24/100)