Variable

Trichorionic triplets N = 119

Dichorionic triplets N = 53

p-value

Successful ART type

IUI/ovulation induction

IVF

FET

33 (27.7)

64 (53.8)

22 (18.5)

2 (3.8)

42 (79.2)

9 (17)

0.001

Fetal heartbeats, n (%)

3

119 (100)

53 (100)

Na

Egg source, n (%)

Autologous

102 (85.7)

43 (81.1)

Donor

17 (14.3)

10 (18.9)

0.446

Sperm retrieval, n (%)

Fresh

106 (89.1)

39 (73.6)

Frozen

13 (10.9)

14 (26.4)

0.010

PGD, n (%)

3 (3.5)

4 (7.8)

0.424

Hatching, n (%)

Assisted

77 (89.5)

36 (70.6)

Not assisted

9 (10.5)

15 (29.4)

0.005

Max FSH, mean (SD)

10.2 (13.3)

8.3 (2.9)

0.349

ET number, mean (SD)

3.0 (0.9)

2.2 (0.5)

<0.001

Transfer day, n (%)

Day 3

≥Day 5

24 (28.2)

61 (71.8)

6 (12)

44 (88)

0.028

Days to 1^st US recognition, mean (SD)

24.3 (3.3)

23.2 (3.9)

0.066

Days to triplet identification, mean (SD)

24.8 (3.6)

27.8 (4.4)

<0.001

1^st US recognition to triplet identification, mean (SD)

0.6 (2.1)

4.5 (4.8)

<0.001