Chromosomal and histological changes in the reproductive organs of infertile men

1978 ◽  
Vol 45 (2) ◽  
pp. 111-114 ◽  
Author(s):  
Miroslava D. Mićić ◽  
Nada V. Savković ◽  
Sava R. Mićić
Keyword(s):  
Reproductive Organs ◽  
Histological Changes ◽  
Infertile Men

Pregnancy in a marsupial, the Tasmanian pademelon (Thylogale billardierii)

1999 ◽  
Vol 11 (3) ◽  
pp. 175 ◽  
Author(s):  
R. W. Rose ◽  
J. A. A. Horak ◽  
A. D. Shetewi ◽  
S. M. Jones
Keyword(s):  
Corpus Luteum ◽  
Reproductive Biology ◽  
Plasma Concentrations ◽  
Tammar Wallaby ◽  
Reproductive Organs ◽  
Model Species ◽  
Histological Changes ◽  
Plasma Progesterone ◽  
Embryonic Growth ◽  
Background Data

The Tasmanian pademelon, Thylogale billardierii, is a medium-sized wallaby that adapts well to captivity and, unlike the well-studied tammar wallaby, is capable of breeding all year round. It may, there-fore, be a useful model species for research into the reproductive biology of macropod marsupials. This paper presents necessary background data on histological changes in the reproductive organs and the rate of embryonic growth during gestation in T. billardierii. After Day 4 RPY (removal of young from the pouch) the gravid and non-gravid uteri differ significantly in some histological parameters. The corpus luteum becomes active by Day 6 RPY and is fully developed by Day 14 RPY; it begins to degenerate from Day 19 RPY. Plasma progesterone concentrations through gestation follow a pattern similar to that in the tammar wallaby. There is an early, smaller, peak at Day 5 RPY, with plasma concentrations of progesterone then falling until the larger pre-partum peak occurs several days before birth.

Bee glue (propolis) improves reproductive organs, sperm quality and histological changes and antioxidant parameters of testis tissues in rats exposed to excess copper

Andrologia ◽  
2020 ◽  
Vol 52 (4) ◽  
Author(s):  
Ismail Seven ◽  
Pinar Tatli Seven ◽  
Burcu Gul Baykalir ◽  
Tuba Parlak Ak ◽  
Seyma Ozer Kaya ◽  
...  
Keyword(s):  
Sperm Quality ◽  
Reproductive Organs ◽  
Histological Changes ◽  
Excess Copper ◽  
Antioxidant Parameters

scholarly journals Anatomical and histological changes during the oestrous cycle in the mare

1941 ◽  
Vol 130 (858) ◽  
pp. 1-23 ◽  
Keyword(s):  
Corpus Luteum ◽  
Reproductive Organs ◽  
Oestrous Cycle ◽  
Maximum Diameter ◽  
Histological Changes ◽  
Graafian Follicle ◽  
Heat Period ◽  
To Come ◽  
Time Required ◽  
Dominant Part

The mares chosen for the investigation of the changes in the reproductive organs during the oestrous cycle were kept under observation for some time before they were killed. The duration of the heat period in these animals was 7 days and the length of the dioestrus was 16 days. Ovulation takes place at about a day before the end of oestrus. The size of the ovary during the oestrous cycle is chiefly influenced by the growing Graafian follicle. The number of follicles present at different stages varies greatly. The numerous small follicles present at the beginning of oestrus disappear later in the cycle; it is suggested that this may be due to the lack of follicle-stimulating hormone. The colour of the corpus luteum varies greatly at different stages of the cycle. The rupture of the follicle is associated with some bleeding. The active stage of the corpus luteum is very short, and the maximum diameter of the corpus luteum seems to be always below that of the Graafian follicle. The greater development of the Graafian follicle, with its secretion of oestrin, in the mare leads to its playing a more important role than in the cow and the sow, in which species the corpus luteum takes a m ore dominant part in the cycle. It appears that the much longer oestrus in the mare than in the cow is due to the longer time required by the follicle to come to the surface and to break through. This is probably due to the peculiar structure of the ovary in the mare, since the ovulation, which is spontaneous, can only occur in the small ovulation fossa. No pronounced secretion stage occurs during oestrus in the Fallopian tubes.

XIII.—Cytological Studies on the Reproductive Organs. Chromosome Behaviour in the Male Grey Squirrel (Sciurus carolinensis leucotus)

1937 ◽  
Vol 56 ◽  
pp. 196-209 ◽  
Author(s):  
P. C. Koller
Keyword(s):  
Reproductive Organs ◽  
Economic Importance ◽  
Sciurus Carolinensis ◽  
Chromosome Behaviour ◽  
American Continent ◽  
Grey Squirrel ◽  
Histological Changes ◽  
North American Continent ◽  
The North ◽  
Great Economic Importance

The grey squirrel (Sciurus carolinensis leucotus Gapper), which is a native of the North American continent, was introduced into England and Scotland quite recently and soon became of great economic importance in these countries. In his very excellent monograph, Middleton (1930) states that both sexes of the grey squirrel show diminished activity during the winter and while they do not hibernate in the true sense of the word, they probably sleep if the weather is severe. The breeding habits of the female were studied by Deanesly and Parkes (1933), who ascertained that the female definitely has a period of anœstrus during which the reproductive organs are atrophic. In the male, however, fully functional testes were found throughout the year (Allanson, 1933), and there were no histological changes which would indicate a regular period of quiescence.

scholarly journals PP038—Soy diet causes histological changes on the reproductive organs of adult male rats

2013 ◽  
Vol 35 (8) ◽  
pp. e29
Author(s):  
P. Papaioannidou ◽  
T. Papamitsou ◽  
I. Kyriakidis ◽  
I. Makaronidis ◽  
I. Papaioannidis ◽  
...  
Keyword(s):  
Adult Male ◽  
Reproductive Organs ◽  
Male Rats ◽  
Histological Changes

scholarly journals Chromosome behaviour in the male ferret and mole during anoestrus

1936 ◽  
Vol 121 (822) ◽  
pp. 192-206 ◽  
Keyword(s):  
Seasonal Variation ◽  
Breeding Season ◽  
Reproductive Organs ◽  
Quiescent State ◽  
Chromosome Behaviour ◽  
Histological Changes ◽  
Short Period ◽  
Cytological Changes

The breeding season of many Mammals is restricted to a relatively short period of the year. In such species usually both sexes exhibit a more or less well-defined seasonal variation in their reproductive organs. Several investigators have found that these variations in the male consist chiefly of alteration in the size of the testes and epididymis, accompanied by marked histological and cytological changes leading to a complete absence of sperms during the quiescent or anoestrous period. The cyclic histological changes in the testes and in the accessory organs have been described in detail in the ferret ( Putorius furo, L .) by Allanson (1932), and in the mole ( Talpa europea, L .) by Tandler and Grosz (1912) and Allanson ( unpublished ). It was found in both genera that during the breeding season spermatogenesis is complete and very active in the rapidly growing testis, but after that period the reproductive organs return to a quiescent state and sperms are entirely absent.

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.

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