Table 3 Parallelisms between placental implantation and invasion characteristics in primates, presence and sugar structure of CG or LH, and relative brain masses.
From: New discoveries on the biology and detection of human chorionic gonadotropin
Species | Implantation characteristics | Depth of Invasion | Sugar structures, pI | Brain mass (%) |
|---|---|---|---|---|
Hominids | Hemochorial | 1/3rd myometrium | CG, 8 structures, pI 3.5 | 2.4% |
Advanced simian primate | Hemochorial | 1/10th myometrium | CG, 6 structures, pI 4.9 | 0.74% |
Early simian primate | Hemochorial | through decidua | CG, 5 structures, pI 6.3 | 0.17% |
Prosimian primate | epitheliochorial | no-invasion | No CG produced LH, 3 structures, pI 8.4 | 0.07% |