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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