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Table 4 The comparison of clinical parameters among the different age groups (n=318)

From: Predictive factors of ovarian response to GnRH antagonist stimulation protocol: AMH and age are potential candidates

Clinical parameters

(Age ≤ 25)

(n = 121)

(Age= 26–35)

(n = 154)

(Age > 35)

(n = 43)

P-value

Mean ± SD

Mean ± SD

Mean ± SD

Basal E2 level (pg/mL)

32.78±16.64

38.26±20.81

36.01±18.94

0.155

Basal FSH level (mIU/mL)

7.07±2.77

7.48±2.43

7.63±3.05

0.155

Basal LH level (ng/mL)

6.12±3.87

5.90±3.26

4.78±2.53

0.026

Basal PRL level (ng/mL)

15.41±7.57

15.26±8.79

18.28±29.23

0.831

Basal TSH level (uIU/mL)

1.91±1.35

2.10±1.42

2.00±1.07

0.432

AMH level (ng/mL)

4.16±2.86

3.54±3.32

2.04±2.15

< 0.001

E2 level on hCG day (pg/ml)

2111.31±791.31

1989.87±959.94

1624.00±839.29

0.002

Number of retrieved oocyte

11.42±4.73

9.83±5.35

5.84±4.61

< 0.001

Number of mature oocytes

7.93±3.10

6.99±3.50

4.12±3.77

< 0.001

Number of immature oocytes

3.36±3.02

2.84±2.88

1.72±2.10

< 0.001

Number of fertilized oocytes

6.24±2.18

5.63±2.63

3.30±2.53

< 0.001

Number of embryos transferred

4.10±1.49

3.72±1.69

2.79±1.54

< 0.001

Value of ß-HCG (mIU/mL)

7.75±5.94

6.56±5.26

4.60±4.90

< 0.001

  1. The values are expressed as mean ± SD
  2. SD standard deviation, AMH anti-Müllerian hormone, E2 estradiol, FSH follicle-stimulating hormone, LH luteinizing hormone, PRL prolactin hormone, TSH thyroid-stimulating hormone, ß-HCG beta human chorionic gonadotropin
  3. P < 0.05, significant; P ≥ 0.05, not significant