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Table 2 Pregnancy outcomes by single blastocyst and single cleavage

From: Single blastocyst transfer yields similar pregnancy rates compared with multiple cleavage embryo transfer, with reduced twin rate, in patients with low number of fertilized oocytes

Pregnancy outcomesSingle blastocyst (n = 1138)Single cleavage (n = 1925)OR (95% CI)P value
Clinical pregnancy rate489 (43%)526 (27%)2.03 (1.72, 2.41)a< 0.0001
Live birth rate398 (35%)439 (23%)1.86 (1.55, 2.22)a< 0.0001
Miscarriage rate84 (17%)84 (16%)1.10 (0.76, 1.59)a0.60
Total number of cycles with heart beats456493 
 Singleton rate443 (97%)487 (99%)0.42 (0.16, 1.11)b0.08
 Twins rate13 (3%)5 (1%)2.86 (1.01, 8.10)b0.05
 Triplets01 
 Quadruplets00 
  1. aAdjusted for age, race, BMI, smoker, parity, gravida, infertility diagnoses, and assisted hatching
  2. bUnadjusted