The placental transfer of IgG in the cynomolgus monkey.
The placental transfer of IgG from the mother to her fetus was investigated with colony-bred cynomolgus monkeys. Very low levels of IgG were detected in sera of 84 days old fetus, indicating that transplacental transfer of IgG had started by this fetal age. Afterwards, gradual increase in the IgG level continued till 140 days of fetal age. A marked increase in the level was noted after 140 days of fetal age, during the last 4 weeks of full gestation term. Fetal anti-measles antibody increased in a pattern similar to that in the IgG level. The IgG level and anti-measles and anti-streptolysin O antibody titers of newborns never exceeded those of their mothers.
D000818:Animals; D000831:Animals, Newborn / Q000276:immunology; D005260:Female; D005333:Fetus / Q000276:immunology; D005865:Gestational Age; D007074:Immunoglobulin G / Q000378:metabolism; D008251:Macaca / Q000196:embryology*; D008252:Macaca fascicularis / Q000196:embryology* / Q000276:immunology; D008431:Maternal-Fetal Exchange; D011247:Pregnancy
D007074:Immunoglobulin G