LIST OF TEXT FIGURES 



Figure Page 



26. Diagram, effect of progesterone on estrin-depriva- 



tion bleeding 165 



27. Hypothetical explanation of the ovulatory cycle 166 



28. Growth of the human uterus in pregnancy 200 



29. Development of the mammary gland 209 



50. The human male reproductive tract 219 



51. Structure of the testis and epididymis 221 



52. Effect of testis hormone on the cock's comb 2S3 



