160 



SUBJECT INDEX 



Oestrin, and sterilization, 120, 121 

 effect on cleavage and growth 



stages, 117 and ff. 

 effect on egg cultures, 95, 122 

 effects on ovaries and ovogenesis, 

 25, 27 

 Oestrus cycle, 22 

 Oocytes, primate, 11 

 Ova, ovarian morphogenesis, 6 and ff. 

 ovarian, number at various ages, 



23 

 primary, minimum size, 32 

 Ovariectomy, bilateral, effect on 

 ovaries, 15-20 



effect on ovum growth, 116, 117 

 Ovaries, effects of x-ray on, 21 



transplanted, 20, 21 

 Ovogenesis, effects of pituitary secre- 

 tions, 22 and ff. 

 Ovum, albumin covering in rabbit, 70 

 atresia and activation, 54, 55 

 binucleate, 57 

 condition at ovulation, 68 

 corona, 71 



entry into uterus, 70 and ff. 

 fertilizable life, 82 and ff. 

 fragmentation, 52, 72 and ff. 

 human, recovery of, 63 

 maturation in rabbit, 46 

 methods of culture, 64-66 

 oestrin production, 44 

 polar body formation, 47-49 

 rate of passage in tubes, 74 

 recovery from tubes and uterus, 



62-64 

 sizes in various classes of mam- 

 mals, 40 

 transplantation into oviduct, 66, 



67, 94, 97 

 tubal, artificial activation of, 190 



and ff. 

 tubal, cytology after activation, 



107, 108 

 tubal, effect of age on behavior 

 in vitro, 106 



Ovum — Continued 



tubal, effect of retention in tubes, 



111 

 unfertilized, behavior in vitro, 98 



and ff. 

 unfertilized, tubal history of, 68 



and ff. 

 vitellus at fertihzation, 80-82 



Parthenogenesis, 1 



and activation, 53 and ff. 



ovarian, 57-59 

 Pituitary hormones, and delayed 

 pregnancy, 125-127 



and maturation, 48-50, 56, 57 

 Pregnancy, and ovogenesis, 22 



delayed, 124 and ff. 

 Pronucleus, 56, 110 

 Pseudomaturation, 33, 42, 43, 51 

 Pseudoparthenogenesis, 53 



Rat, developmental stages, 11-14 



Sperm, penetration into ovum, 82 



swarm, 86 

 Suckling, and pseudopregnancy, 127 

 Superfetation, 50 

 Superovulation, 44 



Tetrad formation in ovarian ova, 47 

 Tissue culture, 3, 64-66 

 Thyroidectomy and ovogenesis, 22 

 Thyroxin and maturation, 50, 51, 56, 



57 

 Trephones, 28, 55 

 Trypsin, effect on ova, 79-81 



Vesicle, germinal, 112 and ff. 



X-rays, and pachytene stage of 

 meiosis, 39 



effects on ovaries, 21 



Zona pellucida, formation, 37 

 loss of, 1 16 



