Effects of season on the reproductive organs and steroid hormone profiles in guinea hens (Numida meleagris)

2016 ◽  
Vol 57 (2) ◽  
pp. 280-286 ◽  
Author(s):  
I. I. Abdul-Rahman ◽  
F. Y. Obese ◽  
J. E. Robinson ◽  
B. Awumbila ◽  
I. A. Jeffcoate
Keyword(s):  
Steroid Hormone ◽  
Reproductive Organs ◽  
Numida Meleagris

Effects of dietary levels of oxytetracycline on the growth and organ weights of guinea fowl (Numida meleagris)

1988 ◽  
Vol 111 (2) ◽  
pp. 217-220
Author(s):  
Tunde Oguntona
Keyword(s):  
Body Weight ◽  
Growth Response ◽  
Treatment Effects ◽  
Reproductive Organs ◽  
Guinea Fowl ◽  
Visceral Organ ◽  
Organ Weights ◽  
Numida Meleagris ◽  
Male Reproductive Organs ◽  
Different Levels

summaryGrowth and visceral organ weights of male guinea fowl (Numida meleagris) given different levels of oxytetracycline have been studied in two experiments. In the first experiment 0, 5·0, 10·0, 15·0 and 20·0 mg oxytetracycline per kg diet were given to male guinea fowl from day 1 to 12 weeks. Body weight showed significant (P < 0·05) increases with incremental levels of the antibiotic up to 10 mg/kg diet. No further increases in growth were recorded with supplementation above this level. There were no treatment effects on the gizzard, lungs and male reproductive organs. Only the heart, liver and intestine weights were significantly (P < 0·05) affected by the treatment, and then only at the highest (20 mg/kg) of the inclusion rates examined. A second experiment was conducted to find out if the growth response obtained with 10 mg/kg oxytetracycline could be produced with a smaller dose. This was achieved at 6·6 mg/kg.

scholarly journals PERFORMANCE AND VISCERAL ORGAN WEIGHTS OF GUINEA FOWL (Numida meleagris) GIVEN DIFFERENT ANTIBIOTICS AS GROWTH PROMOTANTS

2021 ◽  
Vol 16 ◽  
pp. 68-71
Author(s):  
T. Oguntona
Keyword(s):  
Treatment Effects ◽  
Reproductive Organs ◽  
Visceral Organ ◽  
Organ Weights ◽  
Visceral Organs ◽  
Numida Meleagris ◽  
Zinc Bacitracin ◽  
Growth Promotants ◽  
Effect Of Feeding ◽  
Fat Pads

The effect of feeding recommended levels of three antibiotics on the visceral organs of growing guinea fowls has been examined. Day old broiler type guinea fowls were given Oxytetracycline, Rocaryone, and zinc bacitracin supplemented diet till 12 weeks of age. Dressed weight of medicated guineas were significantly higher than controls. No treatment effects were observed on the lungs, gizzards and reproductive organs. Fat pads were significantly (P.05) heavier in treated birds as compared with controls. Heart and liver weights were also significantly higher (P.05) in treated guinea fowls. 

Sex steroid effects at target tissues: mechanisms of action

2007 ◽  
Vol 31 (1) ◽  
pp. 26-33 ◽  
Author(s):  
Margaret E. Wierman
Keyword(s):  
Steroid Receptors ◽  
Steroid Hormone ◽  
Reproductive Function ◽  
Reproductive Organs ◽  
Mechanisms Of Action ◽  
Sex Steroid ◽  
Hormone Action ◽  
Disease States ◽  
Specific Effects ◽  
Insight Into

Our understanding of the mechanisms of sex hormone action has changed dramatically over the last 10 years. Estrogens, progestins, and androgens are the steroid hormones that modulate reproductive function. Recent data have shown that many other tissues are targets of sex hormones in addition to classical reproductive organs. This review outlines new advances in our understanding of the spectrum of steroid hormone ligands, newly recognized target tissues, structure-function relationships of steroid receptors, and, finally, their genomic and nongenomic actions. Sex-based specific effects are often related to the different steroid hormone mileu in men compared with women. Understanding the mechanisms of sex steroid action gives insight into the differences in normal physiology and disease states.

scholarly journals Progesterone and Breast Cancer

2008 ◽  
Vol 4 (2) ◽  
pp. 151-162 ◽  
Author(s):  
Carol A Lange ◽  
Douglas Yee
Keyword(s):  
Breast Cancer ◽  
Steroid Hormone ◽  
Hormone Replacement ◽  
Reproductive Organs ◽  
Normal Breast ◽  
Breast Development ◽  
Cancer Therapies ◽  
First Line ◽  
The Brain

Progesterone is an ovarian steroid hormone that is essential for normal breast development during puberty and in preparation for lactation and breastfeeding. The actions of progesterone are primarily mediated by its high-affinity receptors, which include the classical progesterone receptor (PR)-A and -B isoforms, located in diverse tissues, including the brain, where progesterone controls reproductive behavior, and the breast and reproductive organs. Progestins are frequently prescribed for contraception or during postmenopausal hormone replacement therapy, in which progestins are combined with estrogen as a means to block estrogen-induced endometrial growth. The role of estrogen as a potent breast mitogen is undisputed, and inhibitors of the estrogen receptor and estrogen-producing enzymes (aromatases) are effective first-line cancer therapies. However, PR action in breast cancer is grossly understudied and remains controversial. Herein, we review existing evidence and discuss the challenges to defining a role for progesterone in breast cancer.

Ultrastructural aspects of gymnosperms reproductive organs tissues due to their functional condition

1978 ◽  
Vol 36 (2) ◽  
pp. 440-441
Author(s):  
G. M. Kozubov
Keyword(s):  
Metabolic Activity ◽  
Functional Condition ◽  
Reproductive Organs ◽  
Considerable Change ◽  
Complicated Structure ◽  
Tetrad Stage ◽  
Ubisch Bodies ◽  
Similar Organization ◽  
Female Reproductive Organs ◽  
High Metabolic Activity

The ultrastructure of reproductive organs of pine, spruce, larch and ginkgo was investigated. It was found that the male reproductive organs possess similar organization. The most considerable change in the ultrastructure of the microsporocytes occur in meiosis. Sporoderm is being laid at the late tetrad stage. The cells of the male gameto-phyte are distinguished according to the metabolic activity of the or- ganells. They are most weakly developed in the spermiogenic cell. Ta-petum of the gymnosperms is of the periplasmodic - secretorial type. The Ubisch bodies which possess similar structure in the types investigated but are specific in details in different species are produced in tapetum.Parietal and subepidermal layers are distinguished for their high metabolic activity and are capable of the autonomous photosynthesis. Female reproductive organs differ more greatly in their struture and have the most complicated structure in primitive groups. On the first stages of their formation the inner cells of nucellus are transformed into the nucellar tapetum in which the structures similar to the Ubisch bodies taking part in the formation of the sporoderm of female gametophyte have been found.

Pelvic Impairments

2018 ◽  
Vol 23 (4) ◽  
pp. 9-10
Author(s):  
James Talmage ◽  
Jay Blaisdell
Keyword(s):  
Pelvic Ring ◽  
Reproductive Organs ◽  
High Impact ◽  
Pelvic Fractures ◽  
Motor Dysfunction ◽  
Impact Event ◽  
Concomitant Injuries ◽  
Rating Process ◽  
Pass Through ◽  
A Minor

Abstract Pelvic fractures are relatively uncommon, and in workers’ compensation most pelvic fractures are the result of an acute, high-impact event such as a fall from a roof or an automobile collision. A person with osteoporosis may sustain a pelvic fracture from a lower-impact injury such as a minor fall. Further, major parts of the bladder, bowel, reproductive organs, nerves, and blood vessels pass through the pelvic ring, and traumatic pelvic fractures that result from a high-impact event often coincide with damaged organs, significant bleeding, and sensory and motor dysfunction. Following are the steps in the rating process: 1) assign the diagnosis and impairment class for the pelvis; 2) assign the functional history, physical examination, and clinical studies grade modifiers; and 3) apply the net adjustment formula. Because pelvic fractures are so uncommon, raters may be less familiar with the rating process for these types of injuries. The diagnosis-based methodology for rating pelvic fractures is consistent with the process used to rate other musculoskeletal impairments. Evaluators must base the rating on reliable data when the patient is at maximum medical impairment and must assess possible impairment from concomitant injuries.

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