Introduction＆By JOSEPH T．VELARDO 387
Part Ⅰ．Historical and Morphogenetic Considerations 389
Historical and Cultural Aspects of the Uterus＆By ALFRED PLAUT 389
Embryology of the Uterus：Normal and Experimental＆By EMIL WITSCHI 412
Growth and Development of the Uterus：the Relationship of Epithelium to Mesenchyme＆By PETER GRUENWALD 436
Steroid Hormones and Uterine Growth＆By JOSEPH T．VELARDO 441
Part Ⅱ．Biochemistry and Histochemistry of the Uterus 463
Some Biological Aspects of the Uterus＆By JAMES H．LEATHEM 463
Steroid Influences on the Lactic Dehydrogenase-DPNH Oxidase System of the Rat Uterus＆By ARLEY T．BEVER 472
Histochemical Observations of Oxidative Enzyme Systems in the Uterus and Vagina of the Rat＆By CHARLES G．ROSA AND JOSEPH T．VELARDO 491
Cytochemical Studies on Nonmalignant and Malignant Human Endometria＆By MARGARET E．LONG AND FUMIO DOKO 504
Estrogens and Uterine Enzymes＆By CLAUDE A．VILLEE 524
Part Ⅲ．Problems in Uterine Tumors 535
Adenocarcinoma of the Uterine Fundus in the Rabbit＆By HARRY S．N．GREENE 535
Carcinoma of the Uterine Cervix and Upper Vagina：Induction Under Experimental Conditions in Mice＆By W．U．GARDNER 543
Hydatidiform Mole and Choriocarcinoma＆By HUGH G．GRADY 565
Uterine Sarcomas：Histogenesis and Taxonomy＆By WILLIAM B．OBER 568
Estrogens，Endometrial Hyperplasia，and Endometrial Carcinoma＆By R．R．GREENE，J．W．RODDICK，JR．，AND MILDRED MILLIGAN 586
Part Ⅳ．Blood Coagulation in Pregnancy，Labor，and the Puerperium 601
Fibrinogenopenic Accident of Pregnancy and Delivery：a Syndrome with Multiple Etiological Mechanisms＆By MARIO STEFANINI AND RINALDO A．TURPINI 601
Coagulation Components in Normal and Abnormal Pregnancies＆By OSCAR D．RATNOFF AND THOMAS R．HOLLAND 626
Etiology of Fibrinopenia：Fibrination Defibrination＆By CHARLES L．SCHNEIDER 634
Etiology of Afibrinogenemia：Fibrinogenolytic and Fibrinolytic Phenomena＆By LOUISE LANG PHILLIPS 676
Clinical Considerations in Hypofibrinogenemia＆By DUNCAN E．REID 685
Part Ⅴ．Aspects of the Gravid Uterus 691
Gestation Mechanisms＆By S．R．M．REYNOLDS 691
Implantation＆By BENT G．BOVING 700
Vascular Adaptations of the Uterus to Pregnancy＆By ELIZABETH M．RAMSEY 726
The Dynamics of Amniotic Fluid＆By ALBERT A．PLENTL 746
Blood Flow of the Gravid Uterus＆By SEYMOUR L．ROMNEY，JAMES METCALFE，DUNCAN E．REID，AND C．SIDNEY BURWELL 762
Part Ⅵ．Uterine Contractions 770
Innervation of the Human Uterus＆By KERMIT E．KRANTZ 770
Comparative Study of Uterine Contractility，Urinary Estrogen-Pregnanediol Levels，and Myometrial Disappearance Time of Radioactive Sodium in Full-Term Pregnancy and Premature Delivery＆By PAUL D．BRUNS AND E．STEWART TAYLOR 785
Function and Regulation of the Myometrium＆By ARPAD CSAPO 790
Electrohysterography＆By CHARLES M．STEER 809
Oxytocin and Contractility of the Pregnant Human Uterus＆By ROBERTO CALDEYRO-BARCIA AND JUAN J．POSEIRO 813
Part Ⅶ．Menstruation and Menstrual Disorders 831
A Theory of Menstruation＆By JOHN ROCK，CELSO-RAMóN GARCíA，AND MIRIAM F．MENKIN 831
The Natural History of Menstrual Disorders＆By ANNA L．SOUTHAM 840
Part Ⅷ．Structural and Functional Aspects of the Placenta 855
Comparative Anatomy of the Placenta＆By E．C．AMOROSO 855
Aspects of Placental Function＆By A．ST．G．HUGGETT 873
Placental Steroids＆By RAYMOND L．VANDE WIELE AND JOSEPH W．JAILER 889
Placental Transfer of Thyrotropic Hormone，Thyroxine，Triiodothyronine，and Insulin in the Rat＆By ERNEST KNOBIL AND JOHN B．JOSIMOVICH 895
Chromosomal Sex Detection in the Human Newborn and Fetus from Examination of the Umbilical Cord，Placental Tissue，and Fetal Membranes＆By ARTHUR R．SOHVAL，JOSEPH A．GAINES，AND LOTTE STRAUSS 905
Part Ⅸ．An Evaluation of Nonsteroidal Ovarian Hormones 923
Historical Aspects of Relaxin＆By GUSTAV J．MARTIN AND URIEL SCHOENBACH 923
Biochemistry of Nonsteroidal Ovarian Hormones＆By EDWARD H．FRIEDEN 931
The Effects of Estrogens．Progestagens，and Relaxin in Pregnant and Nonpregnant Laboratory Rodents＆By R．L．KROC，B．G．STEINETZ，AND V．L．BEACH 942
The Action of Relaxin on the Uterus of the Rat，Mouse，and Rabbit＆By M．X．ZARROW AND D．M．BRENNAN 981
Some Clinical Observations of Relaxin in Obstetrics＆By WAYNE H．DECKER 991
Lutrexin in the Treatment of Premature Labor＆By G．H．REZEK 995
Effects of Relaxin on the Nonpregnant and Pregnant Uterus＆By JOHN V．KELLY 998
Relaxin in Dysmenorrhea and Its Effect In Vitro Upon Muscular Contraction＆By HERBERT S．KUPPERMAN，DAVID ROSENBERG，AND ARTHUR CUTLER 1003
Effects of Relaxin on Term and Premature Labor＆By MARTIN L．STONE，ALEXANDER SEDLIS，AND MARVIN B．ZUCKERMAN 1011
The Use of Cervilaxin in Term Labor＆By CHARLES BIRNBERG AND MAURICE ABITBOL 1016
The Effects of Relaxin on Term and Premature Labor＆By EDUARD EICHNER，IRWIN HERMAN，LEONARD KRITZER，GERALD M．PLATOCK，AND LEE RUBINSTEIN 1023
Discussion：Part Ⅸ 1033