Reproduction, Fertility and Development | VOL. 33
Read

87 Population estimate and morphology of ovarian preantral follicles in fetal and adult alpacas (Vicugna pacos)

Publication Date Jan 1, 2021

Abstract

Preantral follicles are the largest ovarian follicle population and represent an important source of potentially competent oocytes. During the lifespan of the female this large population becomes atretic during their growth. In alpacas, there are few studies that estimate the number of preantral follicles. Therefore, the objective of the present study was to compare the population and morphology of preantral follicles in the ovaries of fetal and adult alpacas. Ovaries from alpacas in fetal (fetus during the last third of gestation, n=5) and adult stage (3–4 years, n=5) were collected at a local slaughterhouse. The whole ovaries were individually fixed overnight at room temperature, and later dehydrated in alcohol, cleared with xylene, and embedded in paraffin. Tissue were sectioned at 7μm with a rotating microtome. Then, sections were processed and stained with periodic acid Schiff and haematoxylin. Preantral follicles were classified for their development stage as primordial, transitional, primary, or secondary, according to the layer number and form of granulosa cells. Estimation of the number of preantral follicles was made by counting all follicles in each histological section. Only follicles in which the oocyte nucleus was visible were counted. In addition, for each follicle category (n=30 per group), oocyte and follicle diameters were measured using Motic Images Plus 2.0 software. The population estimate and follicular diameter were compared using Kruskal–Wallis test with significance set at P ≤ 0.05 using SPSS v.2 2 ...

Concepts

Adult Alpaca Adult Alpacas Primordial Follicles Number Of Preantral Follicles Preantral Follicles Morphology Of Preantral Follicles Follicle Population Last Third Of Gestation Number Of Follicles Third Of Gestation

Round-ups are the summaries of handpicked papers around trending topics published every week. These would enable you to scan through a collection of papers and decide if the paper is relevant to you before actually investing time into reading it.

Climate change Research Articles published between Sep 19, 2022 to Sep 25, 2022

R DiscoverySep 26, 2022
R DiscoveryArticles Included:  5

Disaster Prevention and Management ISSN: 0965-3562 Article publication date: 20 September 2022 This paper applies the theory of cascading, interconnec...

Read More

Coronavirus Pandemic

You can also read COVID related content on R COVID-19

R ProductsCOVID-19

ONE PROBLEM . ONE PURPOSE . ONE PLACE

Creating the world’s largest AI-driven & human-curated collection of research, news, expert recommendations and educational resources on COVID-19

COVID-19 Dashboard

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on “as is” basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The Copyright Law.