CONTENTS. 



Introduction 



Acknowledgments 



Cause of tubal pregnancy 



Tubal pregnancy with normal embryos 



Tubal pregnancy with pathological embryos . 



Tubal pregnancy with pathological ova 



Fertility and sterility 



Implantation in tubal pregnancy 



Normal implantation in uterus 



Normal embryos in the tube 



The trophoblast 



Normal embryos from 6 to 9 mm. in length. . 



Normal embryos over 9 mm. long 



Conclusions regarding normal implantation. . 



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5 



8 



9 



12 



13 



14 



16 



20 



21 



24 



25 



28 



30 



33 



PAGE. 



Pathological embryos in tubal pregnancy 34 



Pathological ova in tubal pregnancy 38 



Degeneration of villi and chorion 41 



Summary: 



Cause 53 



Normal implantation 55 



Tubal pregnancy containing pathological 



embryos 58 



Pathological ova 64 



Addendum 66 



Description of the individual specimens 68 



Bibliography of papers cited 103 



Explanation Plates 1, 2, and 3 104 



