Reproduction in the female

Hrabia, Anna

doi:10.1016/b978-0-12-819770-7.00002-5

Cited by 8 publications

(8 citation statements)

References 407 publications

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“…The weight and diameter of the ovarian follicles followed this hierarchical behavior in the ovary of the analyzed quails along the groups. In hens, prehierarchical follicles can remain at rest for months, entering the hierarchy when they reach 6 to 8 mm, after which only one follicle develops and ovulates in 5 to 10 days (Hrabia, 2021).…”

Section: Discussionmentioning

confidence: 99%

Daily Egg-Cycle in Japanese Quail: Serum Biochemistry, Bones, and Oviduct Changes

Andrade

Cruz

Kaneko

et al. 2023

Braz. J. Poult. Sci.

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This study described changes in the serum biochemistry, morphology of genital organs, long bone, and eggshell during the daily egg formation cycle in Japanese quails. Sixty quails (18-wk) were distributed in 6 groups according to hours post-oviposition (POV): 0 hr POV (16h00), 2 hrs POV (egg in magnum), and 4, 8, 14, and 20 hrs POV (egg in uterus). The magnum had higher relative weight before the next ovulation (20 and 0 hr POV), and its tubular glands showed functional variation through periods: abundant eosinophilic, PAS+, and negative Alcian blue secretion at 0 and 2 hrs, empty glands aspect at 4 hrs, and filled again at 20 hrs POV. Serum albumin and total Ca had the highest value in the 2 hrs group, and the lowest in 8 and 14 hrs groups. Egg-cycle period affected the Ca% of the medullar bone of the femur and tibiotarsus, with the lowest mean at 14 hrs POV (06h00), and the highest mean after oviposition (0 hr POV), showing the recovery of Ca stores in long bones for the next egg cycle. Analysis of the eggshell using scanning electron microscopy evidenced that palisade layer formation starts during the night (8-14 hrs POV), and most parts are secreted during the day period. In conclusion, eggshell secretion in light periods, high magnum activity and medullary bone Ca deposition during midday and afternoon, as well as the ovulation/oviposition in the afternoon, are the main characteristics of the distinct physiological aspects of the egg cycle in quails.

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Section: Discussionmentioning

confidence: 99%

Daily Egg-Cycle in Japanese Quail: Serum Biochemistry, Bones, and Oviduct Changes

Andrade

Cruz

Kaneko

et al. 2023

Braz. J. Poult. Sci.

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Section: Introductionmentioning

confidence: 99%

“…In birds, the female determines the sexes of offspring by donating either a W or a Z chromosome to the egg just hours before ovulation. The other chromosome is lost during meiosis to a polar body that is not fertilized (Hrabia, 2022; Navara, 2018b; Rutkowska & Badyaev, 2008). Therefore, any mechanism that influences which sex chromosome is retained in the oocyte and which is lost could effectively underlie the sex ratio biases that have been observed in birds.…”

Section: Introductionmentioning

confidence: 99%

“…At this point, they undergo rapid yolk deposition (RYD), during which yolk is deposited in concentric rings. In domestic chickens, egg yolks grow over 100‐fold in size over the 7‐day period of RYD (Hrabia, 2022; Walzem et al, 1994). These concentric yolk rings alternate in color between yellow and white.…”

Section: Introductionmentioning

confidence: 99%

“…How might follicles predetermined to retain a particular sex chromosome deposit yolk at different rates? While the mechanisms by which yolk precursors reach and enter the oocyte have been well‐documented (Hrabia, 2022), the factors influencing the rate at which this process occurs, and thus the number of days required for a follicle to grow are less clear. Three main factors may influence the rate of yolk deposition: (1) First, the availability of yolk precursors (dependent on packaging of those precursors by the liver) is important for the deposition of egg yolk (Réhault‐Godbert & Guyot, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Dietary yolk supplements and rate of yolk deposition do not influence sex ratios in Japanese Quail

2023

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Birds appear to have the ability to bias offspring sex ratios in response to environmental and social conditions. The mechanisms responsible remain unknown, however one previous study indicated a link between rates of ovarian follicle growth and the sexes of resulting eggs. This could indicate that either follicles destined to retain male or female follicles grow at different rates, or the rate of ovarian follicle growth determines the sex chromosome that will be retained to influence the sex of the resulting offspring. We tested for evidence of both possibilities by staining yolk rings that are indicative of daily growth. First, we tested for a correlation between the number of yolk rings and the sexes of the resulting germinal discs collected from each egg, and second, we tested whether experimentally decreasing follicle growth rates with a dietary yolk supplement impacts the sexes of the resulting germinal discs. There was no significant correlation between the number of yolk rings and the sexes of the resulting embryos, and decreasing follicle growth rates did not impact sexes of resulting germinal discs. These results indicate that offspring sex is not related to the rate of ovarian follicle growth in quail.

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Sensitive and Cost‐Effective Tools in the Detection of Ovarian Cancer Biomarkers

Elhami,

Mobed,

Soleimany

et al. 2024

Analytical Science Advances

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Women diagnosed with late‐stage ovarian cancer suffer a very high rate of mortality. Accordingly, it is imperative to detect and diagnose the disease as early as possible in its development. Achievement of this aim implies relatively large‐scale screening of women at an age of clinical significance through assay of biomarkers for disease present in blood or serum. Biosensor detection offers an attractive technology for the automated detection of such species. Among several biomarkers that have been identified that are present in patients with ovarian cancer, the only one that is commonly tested for in clinical use is cancer antigen 125, which is considered to be a poor biomarker for the disease. Here, we describe several biosensors that developed in the past decade for the detection of ovarian cancer biomarkers such as CA125, human epididymis protein 4 (HE4) and apolipoprotein A1. The challenges presented by the fabrication of biosensor devices for detecting ovarian cancer and the limited number of biosensors developed for this purpose are discussed.

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Reproduction in the female

Cited by 8 publications

References 407 publications

Daily Egg-Cycle in Japanese Quail: Serum Biochemistry, Bones, and Oviduct Changes

Daily Egg-Cycle in Japanese Quail: Serum Biochemistry, Bones, and Oviduct Changes

Dietary yolk supplements and rate of yolk deposition do not influence sex ratios in Japanese Quail

Sensitive and Cost‐Effective Tools in the Detection of Ovarian Cancer Biomarkers

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