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Table 3 Pregnancy outcomes by single blastocyst and 2+ 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)2+ cleavage (n = 3732)OR (95% CI)P value
Clinical pregnancy rate489 (43%)1627 (44%)0.94 (0.81, 1.09)a0.43
Live birth rate398 (35%)1378 (37%)0.88 (0.76, 1.03)a0.12
Miscarriage rate84 (17%)235 (14%)1.35 (0.99, 1.83)a0.06
Number of embryos transferred, median [Q1, Q3]2 [2, 2] 
Total number of cycles with heart beats4561,522 
 Singleton rate443 (97%)1119 (74%)12.27 (6.99, 21.55)b< 0.0001
 Twins rate13 (3%)383 (25%)0.09 (0.05, 0.15)b< 0.0001
 Triplets019 
 Quadruplets01 
  1. Q1 25th percentile, Q3 75th percentile
  2. aAdjusted for age, race, BMI, smoker, parity, gravida, infertility diagnoses, and assisted hatching
  3. bUnadjusted