Template:Macaque Placental Timeline table
From Embryology
Day | Event |
---|---|
9 | Ovulation beginning contact. Endometrial proliferation to form epithelial plaque. |
10 | Invasion. Erosion of strorna, gland and vessels. Lacunae beginning. Transition of cytotrophoblast to syncytium. |
12 | Trabeculae and cascades of trophoblast cells. Mesoblast, yolk sac. Ovum walls collapsed, no sinusoids. |
13 | Sinusoids communicate with lacunae. Villi begin. Ovum walls dilated, abembryonic wall hypertrophies preparatory to formation of second implantation site. |
15 | Maternal epithelium reaches end of proliferative period. |
17 | Necrotic border zone. Blood in glands. Primitive body mesoderm. |
19 | Villi with three zones established, and branching. Pinocytosis (imbibing of liquid substances}. |
22.5 | Villi vascular. Oedema at junction zone. |
Data from [1] Links: monkey | placenta | timeline |
- ↑ Gatenby JB. Some notes on recent primate embryology. (1945) Irish J. Med. Sci. 177-187.