Table 2. Number of bone growth marks (BGMs) identified in each cross-section.

				Femur			Tibia			Metacarpus			Metatarsus
Individual	Estimated age	Age group	Sex	FLC	EFS	Total	FLC	EFS	Total	FLC	EFS	Total	FLC	EFS	Total
IPS83152	<3 weeks	Perinatal	−	0	−	0	0	−	0	0	−	0	0	−	0
IPS83153	0.5 years	Foal	M	0	−	0	1	−	1*	1		1*	1	−	1*
IPS83154	0.5 years	Foal	M	0	−	0	1	−	1*	1	−	1*	−	−	−
IPS83149	1 year	Yearling	−	2	−	2*	2	−	2*	2	−	2*	2	−	2*
IPS83150	1 year	Yearling	−	2	−	2*	2	−	2*	2	−	2*	2	−	2*
IPS83151	1 year	Yearling	−	1	−	1*	1	−	1*	1	−	1*	1	−	1*
IPS83155	2 years	Juvenile	F	1	−	1	2	−	2*	1	−	1	2	−	2*
IPS83876	4.5 years	Adult	F	4	1	5	4	−	4	3	2	5*	3	2	5*
IPS83877	8 years	Adult	M	4	2	6	5	−	5	4	2	6*	4	2	6*

Notes.

M

male

F

female

FLC

number of BGMs identified within the fibrolamellar complex

EFS

number of BGMs identified within the external fundamental system

^*Indicates that the most internal BGM has been considered as a non-cyclical BGM.