hybridization of polyadenylic- ( + ) ribonucleic acid extracted from amnion , chorion , decidua parietalis , basal plate , and placental trophoblast with a radiolabeled 48 mer oligonucleotide and a 540 base pair complementary deoxyribonucleic acid probe to human placental lactogen showed the placental trophoblast to be the major source of human placental lactogen and the extravillous chorion and basal plate to be additional minor sources .
C0032043
placental
C1511061
basal plate