1-2-3 rule (ovary)
The 1-2-3 rule is a simple aide-mémoire describing the nomenclature of any small simple anechoic structure in the ovary on ultrasound:
- <1 cm = follicle
- 1-2 cm = dominant follicle
- >3 cm = cyst
The 1-2-3 rule is a simple aide-mémoire describing the nomenclature of any small simple anechoic structure in the ovary on ultrasound: