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Table 1 Patients’ baseline characteristics

From: IVF outcome is optimized when embryos are replaced between 5 and 15 mm from the fundal endometrial surface: a prospective analysis on 1184 IVF cycles

  All EFD (mm) p
   <5 5-9.9 10-15 >15  
  (n = 1184) (n = 59) (n = 548) (n = 429) (n = 148)  
Age (years) 35.2 ± 4.4 34.8 ± 4.2 35.2 ± 4.3 35 ± 4.7 35.8 ± 3.8 ns
Smoking habit (%) 16.4 16.4 18.6 15.3 12 ns
BMI 22.8 ± 3.4 24 ± 3.6 22.6 ± 3.2 22.8 ± 3.4 23 ± 3.6 ns
BMI > 25 (%) 23.8 22.3 20.9 23.1 29.9 ns
Duration of infertility (years) 3.8 ± 2.7 3.6 ± 2.2 3.8 ± 2.6 4 ± 2.8 3.8 ± 2.6 ns
Main cause of infertility (%)       
Unexplained 45.2 58.3 45.5 44.2 41.5 ns
Severe endometriosis 14 16.7 12 16.1 14.6 ns
Reduced ovarian reserve 17.9 15.6 21 15.8 16.9 ns
Tubal factor 22.9 19.4 21.5 23.9 27 ns
Associated male factor (%) 69.2 71.2 71.3 65.5 71.6 ns
Basal FSH (UI/L) 7.6 ± 3.1 6.8 ± 2.4 7.9 ± 3.2 7.5 ± 2.8 7.5 ± 3.5 ns
Antral follicle count (AFC) 15.3 ± 8.5 18.2 ± 10.9 15.1 ± 8.8 15.2 ± 8.1 15 ± 7.8 ns
  1. Patients were subgrouped according to the site at which embryos were transferred (EFD = distance between the hyperecogenic spot and the basal layer of the endometrial fundus).