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Table 1 Characteristics of FET cycle in the two study groups

From: Gonadotropin-releasing hormone agonist combined with hormone replacement therapy does not improve the reproductive outcomes of frozen-thawed embryo transfer cycle in elderly patients: a retrospective study

Characteristic

GnRHa-HRT(n = 268)

HRT(n = 996)

P value

Age (y)

40.67 ± 2.07

40.64 ± 2.04

0.804

Years of infertility

6.28 ± 5.27

5.51 ± 4.75

0.021

BMI (kg/m2)

22.51 ± 2.99

22.72 ± 2.94

0.305

FSH (U/L)

7.24 ± 3.10

7.50 ± 3.47

0.315

LH (U/L)

4.00 ± 2.32

4.36 ± 2.73

0.002

Intimal thickness

9.85 ± 2.23

9.14 ± 1.93

< 0.001

No of embryos transferred

1

59(22.01)

258(25.90)

0.146

2

198(73.88)

677(67.97)

3

11(4.10)

61(6.12)

Embryos transferred

Cleavage stage embryo

152(56.72)

627(62.95)

0.062

Blastocyst

116(43.28)

369(37.05)

Fertilization method

IVF

77(28.73)

241(24.20)

0.053

ICSI

185(69.03)

746(74.90)

IVF + ICSI

6(2.24)

9(0.90)

  1. Values are means±SD or number (percentage) of patients. P < 0.05 for t test.
  2. Abbreviations: BMI body mass index; FSH follicle-stimulating hormone; LH luteinizing hormone; ICSI intracytoplasmic sperm injection; IVF in vitro fertilization