At what stage of pregnancy do tertiary chorionic villi develop?
ADay 28
BDay 25
CDay 15
DDay 17
Which immunoglobulin provides natural passive immunity to a newborn through the placenta?
AIgA
BIgG
CIgE
DIgD
Which structure do cytotrophoblasts invade during implantation?
ADecidua capsularis
BDecidua vera
CDecidua basalis
DDecidua parietalis
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