25 h -Appearance of eye; vertebral column visible; embryo begins to turn on left side (6 somites).
28 h -Ear begins (7 somites).
30 h -Amnion (embryonic membrane around embryo) begins. Primary function is to protect embryo against shock and sticking; also responsible for some albumen absorption. Chorion (embryonic membrane that fuses with allantois) begins; heartbeat begins (10 somites).
38 h -Cranial flexure and torsion evident; heartbeat moves blood (16 to 17 somites).
42 h -Thyroid begins.
48 h -Anterior pituitary and pineal glands begin to develop.
we are at 50 hours
48 h -Anterior pituitary and pineal glands begin to develop.
50 h -Embryo turns on left side; allantois (embryonic membrane that fuses with chorion) begins. Functions of chorioallantois are: a) respiration; b) albumen absorption; c) absorption of calcium from shell; d) storage of kidney excretions
50 h -Embryo turns on left side; allantois (embryonic membrane that fuses with chorion) begins. Functions of chorioallantois are: a) respiration; b) albumen absorption; c) absorption of calcium from shell; d) storage of kidney excretions.
60 h -Nasal pits, pharynx, lungs, anterior limb buds begin.
62 h -Posterior limb buds begin.
72 h -Middle and outer ear, trachea begin; amnion completes growth around embryo.
Bad news, all four eggs in the cup didn't make it. But i'm not giving up, I took a part off the egg shell to watch it grow that way. Last time when I did that it hatched out.
Day 4: Tongue and esophagus begin; embryo separates from yolk sac; allantois grows through amnion; contractions occur in amnion wall; adrenal development begins; pronephros (nonfunctional kidney) disappears; metanephros (definitive or final kidney) begins; proventriculus, gizzard, ceca, large intestine begin. Pigment visible in eye (dark eye).