the transplants retained the histological and immunohistochemical picture of the original tissue and maintained synthesis of human chorionic gonadotropin ( hcg ) , pregnancy-specific beta 1-glycoprotein ( sp1 ) , gnrh and placental proteins pp5 , pp11 and pp12 for 5 weeks .
C0033002
pregnancy-specific beta 1-glycoprotein
C0032974
placental proteins