INDEX 



Placenta, defined, 25; of dog-fish, 

 25; estriol in, 249; estrogenic hor- 

 mones in, 203, 204; gonadotrophic 

 hormones in, 201, 202, 262-264; 

 progesterone in, 117, 126, 204; 

 structure, 59, 200, 201 



Plants, estrogens in, 84; fertiliza- 

 tion, 22, 23 



Poehl, A. v., 230 



Postpartum pain, 129 



Pratt, J. P., 185 



Pregnancy, hormones in, 199; main- 

 tenance, 114, 127, 128, 199; tests 

 for, 202, 203 



Pregnane, 251 



Pregnanediol, 120, 121, 185, 204, 

 252, 260; glycuronidate, 121, 253 



Pregneninolone, 260, 261 



Premenstrual state, 146, 157; see 

 also Progestational proliferation 



Prenant, L. A., 44, 103-105 



Price, Dorothy, 143 



Primates, 70, 261 



Proestrous bleeding, 174, 176 



Progestational proliferation, in va- 

 rious animals, 108; in cycle, 144, 

 146; produced by corpus luteum, 

 108, 111-114; defined, 107; in 

 menstrual cycle, 146; in rabbit, 

 113; in monkey, 114 



Progesterone, administration, 117, 

 118, 260; in adrenal gland, 117; 

 chemistry, 116, 251, 252; in cycle 

 of sow, 66; discovery, 103-115; ef- 

 fect on endometrium, 113, 114, 

 120: in estrous cycle, 144; in ex- 

 perimental menstruation, 164- 

 169; difficulties in isolating, 118- 

 120; excreted as pregnanediol, 

 120, 260; relative ineffectiveness 

 in immature animals, 118-120; in- 

 hibition of estrin-deprivation 

 bleeding and menstruation, 164; 

 international unit, 117; isolation, 

 112-115; in lactation, 210, 212, 

 213; in menstrual cycle, 146, 167, 

 169; molecular weight, 186; name, 

 103, 117; in placenta, 117, 126, 

 204; maintenance of pregnancy, 

 114, 127, 128; potency, 117; puri- 



fication, 115; rate of secretion, 

 180-187, 268; relation to sex urge 

 in guinea pig, 98; sources of, 117; 

 synthesis, 116, 253; treatment 

 with, 126-132, 186, 261; effects on 

 uterine muscle, 122-125, 128, 205 ; 

 utilization of by uterus, 188 



Progesterone-deprivation bleeding, 

 164, 165, 169 



Progestin, 116, 117; see a/jo Proges- 

 terone 



Prolactin, 211-213, 268 



Prolan, 264 



Prostate gland, 226, 227 



Protozoa, reproduction in, 3-5, 13- 

 14 



Puberty, growth of reproductive 

 organs at, 80; estrogenic hor- 

 mones in, 95, 96 ; growth of mam- 

 mary glands, 207, 208; develop- 

 ment of male secondary sex char- 

 acteristics, 227 



Quintuplets, 43 

 Quiring, D. P., 268, 269 



Rabbit, embryos, 105; dependence 

 of embryos upon corpus luteum, 

 110, 111; ovulation described, 37; 

 ovulation not spontaneous, 68, 

 106 



Rabelais, Francois, 78 



Rat and mouse, cycle, 65, 68-71, 73, 

 74; test of estrogenic hormones, 

 83 



Reather, C. F., 67 



Rejuvenation, 230, 231 



Relaxin, 113, 114, 120 



Reproduction, bisexual, 11, 14, 15; 

 by budding, 4, 5, 7; by eggs, 8, 9; 

 by longitudinal fission, 3; by mul- 

 tiple fission, 5; by transverse fis- 

 sion, 5; sexual, 10, 20; by spores, 

 5 



Reproductive cycle, see Cycle 



Reptiles, mating, 23 



Rever, A. G., xi 



Reynolds, S. R. M., 49, 124, 126, 

 204-206 



Rhesus monkey, see Monkey 



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