Table 3 Comparison of single and double blastocyst embryo transfer cycle results between January 2014 – July 2019 in women under 35 years of age with 2 or 3 previously, unsuccessful ART treatments

Age years, mean ± SD

29.31 ± 3.42

29.7 ± 3.20

^a < 0,05*

AMH, (ng/ml), mean ± SD

4.03 ± 3.38

3.50 ± 3.38

^a < 0.01*

Maternal BMI, (kg/m²), mean ± SD

24.43 ± 4.48

24.33 ± 4.15

^a0.646

Number of aspirated oocytes, mean ± SD

15.17 ± 9.08

14.62 ± 8.19

^a0.157

MII, mean ± SD

12.51 ± 7.52

11.76 ± 6.50

^a < 0,05*

PN2, mean ± SD

10.33 ± 6.53

9.89 ± 5.71

^a0.111

Implantation Rate, (%)

68.7

51.3

^a < 0.001*

Biochemical Pregnancy, n (%)

1705 (74.5)

436 (74.5)

^b0.81

Clinical Pregnancy, n (%)

1542 (67.4)

395 (67.5)

^b0.85

Biochemical Abortion, n (%)

163 (9.5)

41 (9.4)

^b0.84

Clinical Abortion n (%)

198 (12.8)

42 (10.6)

^b0.69

Total Live Birth, n (%)

1319 (57.6)

347 (59.3)

^b0.49

 Singleton Live Birth, n (%)

1296 (98.2)

180 (51.8)

^b < 0.001*

 Twin Live Birth, n (%)

23 (1.7)

164 (47.2)

^b < 0.001*

 Triplet Live Birth, n (%)

–

3 (0.86)

N/A

Term Live Birth, n (%)

1168 (88.6)

226 (65.1)

^b < 0.001*

Preterm Live Birth, n (%)

151 (11.4)

121 (34.9)

^b < 0.001*