Part Ⅰ．Fundamental Concepts 3
Historical Perspectives on Trophoblast and its Tumors＆By WILLIAM B．OBER 3
The Biology of Trophoblast＆By BENT G．BOVING 21
Homoplastic Implantation of Toadfish(Opsanus tau) Embryos in the Peritoneal Cavity of an Adult Fish＆By PAUL S．GALTSOFF and EUGENIA GALTSOFF 44
Trophoblast：Problems of Invasion and Transport＆By ROBERT W．NOYES 54
Hormonal Actions of Chorionic Gonadotropin＆By JOSEPH THOMAS VELARDO 65
Part Ⅱ．Hydatidiform Mole 86
Genesis of Hydatidiform Mole：Old and New Concepts＆By HENRY W．EDMONDS 86
Problems in the Classification of Hydatidiform Moles＆By J．SMALBRAAK 105
Management of Patients with Hydatidiform Mole＆By C．LEE BUXTON 121
Chorionic Gonadotrophin Determinations in Patients with Hydatidiform Mole and Choriocarcinoma＆By E．DELFS 125
Part Ⅲ．Trophoblastic Tumors 140
The Albert F．Mathieu Chorionepithelioma Registry＆By JOHN I．BREWER 140
Chorioadenoma Destruens＆By R．R．GREENE 143
Aspects of Choriocarcinoma in the Female＆By W．WALLACE PARK 152
Choriocarcinoma of the Testis and Extragenital Choriocarcinoma in Men＆By NATHAN B．FRIEDMAN 161
Geographic Variation in the Occurrence of Hydatidiform Mole and Choriocarcinoma＆By THE JOINT PROJECT FOR STUDY OF CHORIOCARCINOMA AND HYDATIDIFORM MOLE IN ASIA 178
The Natural History of Choriocarcinoma：Problems of Immunity and Spontaneous Regression＆By WADI A．BARDAWIL AND BENJAMIN L．TOY 197
Chemotherapy of Choriocarcinoma and Related Trophoblastic Tumors in Women＆By ROY HERTZ，DELBERT M．BERGENSTAL，MORTIMER B．LIPSETT，EDWARD B．PRICE，and THEODORE F．HILBISH 262