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Table 4 Characteristics of cycles with positive and negative clinical pregnancy

From: Developmental potential of surplus morulas with delayed and/or incomplete compaction after freezing-thawing procedures

Variable Positive pregnancy, n = 43 Negative pregnancy, n = 85 P
Age, year 35.8 ± 3.2 35.9 ± 3.6 NS
Endometrial preparation, hormone replacement, % 74.4 82.4 NS
Peak endometrium thickness, cm 1.1 ± 0.3 1.1 ± 0.2 NS
Containing embryos from top morula (M1), n (%) 16 (37.2) 26 (30.6) NS
No. of embryos transferred per cycle, n 1.8 ± 0.6 1.7 ± 0.5 NS
No. of blastocystsa contained in transferred embryos 1.7 ± 0.7 1.4 ± 0.6 0.023
No. of top blastocystsa contained in transferred embryos 0.9 ± 0.7 0.4 ± 0.6 <0.001
  1. aBlastocysts developed from thawed morulas
  2. NS Not significant