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Table 1 Pregnancy outcomes of patients with serum β-hCG level < 300 mIU/ml 14 days after blastocyst transfer

From: Possibility of live birth in patients with low serum β-hCG 14 days after blastocyst transfer

Pregnancy outcomes < 38 years ≥38 years Total P
%(n) %(n) %(n)
Female age (years) 31 (28,34) 39 (38,41)   1.13E-46 a
AMH (ng/ml) 5.83 (3.56, 9.34) 3.64 (1.84,6.00)   7.45E-5
BMI (kg/m2) 21.9 ± 3.2 23.6 ± 3.7   0.001
Days of embryos transfer %(n)     0.645
 5 68.2 (176/258) 55.6 (30/54)   
 6 29.5 (76/258) 44.4 (24/54)   
 both 5&6 2.3 (6/258) 0(0/54)   
No. of embryos transferred % (n)     0.954
 1 43.0 (111/258) 42.6 (23/54)   
 2 57.0 (147/258) 57.4 (31/54)   
Biochemical pregnancy loss 22.5 (58) 24.1 (13) 22.8 (71) 0.800
Live birth % (n) 19.0 (49) 16.6 (9) 18.6 (58) 0.690
Ectopic pregnancy % (n) 10.1 (26) 7.4 (4) 9.6 (30) 0.545
Early Miscarriage % (n) 46.9 (121) 50.0 (27) 47.4 (148) 0.678
Late miscarriage % (n) 1.5 (4) 1.9 (1) 1.6 (5) 1.000 b
  1. a P values meant to compare differences between the groups of < 38 years and ≥ 38 years .b Fisher exact test were used