greybeard
Herd Master
Bovine fetus developmental milestones:
Days--characteristics
18-----Primitive streak present; amnion complete
24-----Three primary brain vesicles visible; forelimb bud present
26-----Fourth brachial arch and mammary ridge present; hind limb bud forming
30-----Eye pits forming; eyes pigmented; hard palate forming
38-----Eyelids forming; ear forming as a ridge;
40-----Ear partly covers acoustic groove.
50-----Eyelids partially cover eyes.
56-----Palate fused.
60-----Eyelids fused; external genitals differentiated; hooves forming.
76-----Tactile hairs appear on face.
100---Hooves becoming firm and opaque.
110---Tooth eruption begins.
150---Lower lip and chin covered with fine hair; eyelashes present; tactile hairs on
chin; color markings appear; hooves become hard; teats well formed; descent
of testes complete.
196---Eyelid separated
230---Body fully covered with hair
278-290 Birth
Days--characteristics
18-----Primitive streak present; amnion complete
24-----Three primary brain vesicles visible; forelimb bud present
26-----Fourth brachial arch and mammary ridge present; hind limb bud forming
30-----Eye pits forming; eyes pigmented; hard palate forming
38-----Eyelids forming; ear forming as a ridge;
40-----Ear partly covers acoustic groove.
50-----Eyelids partially cover eyes.
56-----Palate fused.
60-----Eyelids fused; external genitals differentiated; hooves forming.
76-----Tactile hairs appear on face.
100---Hooves becoming firm and opaque.
110---Tooth eruption begins.
150---Lower lip and chin covered with fine hair; eyelashes present; tactile hairs on
chin; color markings appear; hooves become hard; teats well formed; descent
of testes complete.
196---Eyelid separated
230---Body fully covered with hair
278-290 Birth
