Uterus

Normal Uterine Appearance and Dimensions

Uterine Stage Gross Features Length (cm) Fundal Width of Body (cm) Cervical Width (cm)
Neonatal*1 Cervix > Fundus 2.3 - 4.6 0.8 - 2.1 0.8 - 2.2
Prepubertal+
1-12 years3		 Fundus/Body < Cervix 2.0 - 3.3 0.5 - 1.0
Postpubertal
13-20 years3		 Fundus > Cervix 5 - 8 1.6 - 3.0
*neonatal uterus regresses to about 2.5 cm at 1 month1.
+After 7 years of age, there is uterine growth4.
Neonatal uterus: 30% of neonatal uteri have a hypoechoic halo surrounding the endometrial canal, which is thought to represent the inner third of the myometrium, which is vascularly engorged1.
 
 

Uterine Volume correlated with Age2

References:

1.  Nussbaum AR, Sanders RC, Jones MD.  Neonatal uterine morphology as seen on real-time US.  Radiology 1986; 160: 641-643.

2.  Ivarsson SA, Nilsson KO, Persson PH.  Ultrasonography of the pelvic organs in prepubertal and postpubertalgirls.  Arch Dis Child.  1983; 58:352-354. (Used with permission from BMJ Publishing Group)

3.  Sample W, Lippe B, Geypes M.  Gray scale ultrasonography of the normal female pelvis.  Radiology 1977; 125:477-483.

4.   Orsini LF, Salardi S, Pilu G, et al.  Pelvic organs in premenarcheal girls: real-time ultrasonography.  Radiology 1984; 153: 113-116.

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