Table 3 Comparison between “unchanged” or “regressed” fibroids (n = 148) and “increased” fibroids (n = 32) at the post-delivery ultrasound compared to the pre-pregnancy” ultrasound.

Age (yr)

34.6 ± 4.9

34.7 ± 3.1

0.91^a

Body Mass Index

24.7 ± 3.7

24.3 ± 3.6

0.58 ^a

Tobacco use

9 (6.8)

0 (—)

0.02^b

No previous pregnancies

1 (0–1)

1 (0–2)

0.15^c

Nulliparous

57 (38.9)

10 (31.3)

0.55^b

Ongoing breastfeeding

90 (60.8)

10 (31.3)

<0.01^b

Gestational age at delivery (weeks)

39.0 ± 1.6

38.9 ± 1.6

0.71^a

Preterm birth

12 (8.1)

3 (9.4)

0.91^b

Vaginal birth

106 (71.6)

23 (71.9)

0.83^b

PPU diameter (mm)

20 (15–26)

30 (20–40)

<0.01^c

FTU diameter (mm)

35 (28–40)

40 (30–49)

0.06^c

STU diameter (mm)

35 (30–42)

40 (30–47)

0.19^c

TTU diameter (mm)

37 (30–43)

38 (31–44)

0.72^c

GD% PPU - FTU (%)

71 (28–150)

25 (0–72)

<0.01^c

GD% FTU - STU (%)

1.3 (−3.8–8.2)

0 (−9.2–−4.7)

0.11^c

GD% STU - TTU (%)

6 (3–8)

3.5 (−18–9)

0.13^c