The Annual Reproductive Cycle of the California Gull: II. Histology and Female Reproductive System

The Condor ◽  
1956 ◽  
Vol 58 (3) ◽  
pp. 206-221 ◽  
Author(s):  
David W. Johnston
Keyword(s):  
Reproductive Cycle ◽  
Reproductive System ◽  
Female Reproductive System ◽  
Annual Reproductive Cycle

Morphology of the female reproductive system and reproductive cycle of the mangrove land crabUcides cordatus(L.) in the Baía de Antonina, Paraná, Brazil

2012 ◽  
Vol 94 (1) ◽  
pp. 86-93 ◽  
Author(s):  
Gisela G. Castilho-Westphal ◽  
Antonio Ostrensky ◽  
Marcio R. Pie ◽  
Walter A. Boeger
Keyword(s):  
Reproductive Cycle ◽  
Reproductive System ◽  
Female Reproductive System

Studies on the marsupial glider, Schoinobates volans (Kerr) I. Reproduction

1969 ◽  
Vol 17 (4) ◽  
pp. 625 ◽  
Author(s):  
RFC Smith
Keyword(s):  
Natural Population ◽  
Breeding Season ◽  
Reproductive Cycle ◽  
Reproductive System ◽  
Sexual Maturity ◽  
Field Data ◽  
Reproductive Organs ◽  
Female Reproductive System ◽  
Histological Changes ◽  
Second Year

Field data were obtained during the period September 1962-January 1965 from 710 greater gliders, S. volans, in a natural population. Histological changes were observed in the reproductive tracts of another 129 animals shot during this period. S. volans has a short breeding season in March, April, and May, after which involution of the reproductive organs occurs in both sexes. The species is monovular and polyoestrous. Sexual maturity is attained by both sexes in the second year, following which breeding probably occurs annually. The female reproductive system shows several primitive and anomalous features, among which is the retention of the Wolffian ducts in the adult. The histology of ovaries, uteri, and vaginae at various stages of the reproductive cycle is briefly described.

scholarly journals The annual reproductive cycle of the snail Megalobulimus abbreviatus (Bequaert, 1948) (Gastropoda, Pulmonata)

2005 ◽  
Vol 65 (3) ◽  
pp. 459-467 ◽  
Author(s):  
A. C. M. Horn ◽  
A. Achaval ◽  
D. M. Zancan
Keyword(s):  
Breeding Season ◽  
Reproductive Cycle ◽  
Reproductive System ◽  
Morphological Changes ◽  
Reproductive Organ ◽  
Early Summer ◽  
Egg Laying ◽  
Annual Reproductive Cycle ◽  
Organ Weights ◽  
Maturation Index

Morphological changes in the sexual organs of the pulmonates were observed throughout a year and correlated with reproductive-cycle periods. Reproductive-organ weights of the snail Megalobulimus abbreviatus were recorded seasonally and gonad sections were analyzed morphologically. The weights were used to obtain the organosomatic index. Mean oocytic diameter and oocytic maturation index were based on gonad sections. It was concluded that M. abbreviatus is an iteroparous snail whose annual reproductive cycle is characterized by mating and egg laying throughout spring and early summer, and also by reproductive system preparation, occurring over the remainder of the summer until the end of winter, for a new breeding season.

FEMALE ENDOCRINE CONTROL MECHANISMS DURING THE NEONATAL PERIOD

1972 ◽  
Vol 70 (2) ◽  
pp. 396-408 ◽  
Author(s):  
K.-D. Schulz ◽  
H. Haarmann ◽  
A. Harland
Keyword(s):  
Protein Synthesis ◽  
Reproductive System ◽  
Rna Synthesis ◽  
Neonatal Period ◽  
High Dose ◽  
Female Reproductive System ◽  
Endocrine Control ◽  
Hypothalamic Region ◽  
Rna And Protein Synthesis ◽  
Physiological Dose

ABSTRACT The present investigation deals with the oestrogen-sensitivity of the female reproductive system during the neonatal period. Newborn female guinea pigs were used as test animals. At different times after a single subcutaneous injection of a physiological dose of 0.1 μg or an unphysiologically high dose of 10 μg 17β-oestradiol/100 g body weight, the RNA- and protein-synthesis was examined in the hypothalamic region, pituitary, cerebral cortex, liver, adrenal gland, ovary and uterus. With a physiological dose an increase in organ weight, protein content, RNA-and protein-synthesis was found only in the uterus. These alterations turned out to be dose-dependent. In addition to the findings in the uterus an inhibition of the aminoacid incorporation rate occurred in the liver following the injection of the high oestradiol dose. As early as 1 hour after the administration of 0.1 μg 17β-oestradiol an almost 100% increase in uterine protein synthesis was detectable. This result demonstrates a high oestrogen-sensitivity of this organ during the neonatal period. All the other organs of the female reproductive system such as the hypothalamus, pituitary and ovary did not show any oestrogen response. Therefore the functional immaturity of the uterus during post partem life is not the result of a deficient hormone sensitivity but is correlated with the absence of a sufficient hormonal stimulus at this time. The investigation on the effects of actinomycin resulted in different reactions in the uterus and liver. In contrast to the liver a paradoxical actinomycin effect was found in the uterus after treatment with actinomycin alone. This effect is characterized by a small inhibition of RNA-synthesis and a 50% increase in protein synthesis. The treatment of the newborn test animals with actinomycin and 17β-oestradiol together abolished the oestrogen-induced stimulation of the uterine RNA-and protein-synthesis. Consequently, the effect of oestrogens during the neonatal period is also connected with the formation of new proteins via an increased DNA-directed RNA-synthesis.

Mechanisms underlying pituitary microvascular remodelling in thoroughbred horses during the annual reproductive cycle

2014 ◽  
Author(s):  
Angus Yeomans ◽  
Nichol Thompson ◽  
Jennifer Castle-Miller ◽  
David O Bates ◽  
Domingo Tortonese
Keyword(s):  
Reproductive Cycle ◽  
Annual Reproductive Cycle ◽  
Thoroughbred Horses

Effect of Cryopreserved Placental Explants on Female Reproductive System Under Normal and Pathological Conditions (Experimental study)

2017 ◽  
Vol 27 (3) ◽  
pp. 250-265 ◽  
Author(s):  
Volodymyr Yu. Prokopyuk ◽  
◽  
Olga V. Grischenko ◽  
Oleksandra V. Prokopyuk ◽  
Nadiia O. Shevchenko ◽  
...  
Keyword(s):  
Experimental Study ◽  
Reproductive System ◽  
Female Reproductive System ◽  
Pathological Conditions

ROLE OF ULTRASOUND IN THE DETECTION OF RECURRENT OVARIAN CANCER

2020 ◽  
Vol 6 (1) ◽  
pp. 23-31
Author(s):  
M. Alisherova ◽  
◽  
M. Ismailova
Keyword(s):  
Ovarian Cancer ◽  
Surgical Treatment ◽  
Reproductive System ◽  
Malignant Tumors ◽  
Recurrent Ovarian Cancer ◽  
Primary Diagnosis ◽  
Female Reproductive System

Currently, there are no standard approaches to monitoring patients with ovarian cancer (OC). While the role of ultrasound (US) has been identified in the primary diagnosis of OS, it is still controversial during the subsequent surgical treatment of OC. In world statistics, ovarian cancer is consistently among the four main localizations of malignant tumors of the female reproductive system, along with tumors of the breast, body and cervix.

scholarly journals Species Comparison of the Role of p38 MAP Kinase in the Female Reproductive System

2009 ◽  
Vol 22 (2) ◽  
pp. 109-124 ◽  
Author(s):  
Zaher A. Radi ◽  
Rosemary A. Marusak ◽  
Dale L. Morris
Keyword(s):  
Map Kinase ◽  
Reproductive System ◽  
P38 Map Kinase ◽  
Female Reproductive System ◽  
Species Comparison
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