Medullary Phase - 1
Medullary
phase:
Also referred to as the “myeloid phase”:
Bone cavities form and bone marrow
becomes main site of hematopoiesis.
Types of hemoglobins seen:
Begins during 5
th
month of gestation and
goes throughout life
Hgb A:
alpha
(a)
+
beta
(b)
Hgb F:
alpha
(a)
+
gamma(
g
)
alpha
(a)
+
delta
(d)
Hgb A
2: