What question did this study set out to answer?

To characterize the fine structural changes in porcine corpus luteum cells throughout the estrous cycle and correlate these ultrastructural features with luteal tissue progesterone levels.

April 1, 1969Biology of Reproduction

Fine Structure and Progesterone Levels in the Corpus Luteum of the Pig during the Estrous Cycle1, 2

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Authors

LCLauro F. CavazosUniversity of Oklahoma Medical Center LALloyd L. AndersonIowa State University WBW Duane BeltBoston University

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Implication

Ultrastructural study reveals peak progesterone production coincides with smooth endoplasmic reticulum expansion in gilts, indicating structural dependence of steroidogenesis.

Key Points

To characterize the fine structural changes in porcine corpus luteum cells throughout the estrous cycle and correlate these ultrastructural features with luteal tissue progesterone levels.
Examined corpus luteum cellular morphology in 28 gilts across multiple cycle stages (Days 1, 4, 8, 12, 14, 16, and 18) using electron microscopy.
Quantified progesterone concentrations in adjacent luteal tissue samples from 19 of the gilts.
Progesterone concentrations peaked between Days 8 and 12, coinciding with full cellular hypertrophy, maximal nucleolar expansion, and extensive accumulation of agranular endoplasmic reticulum.
Structural luteal regression commenced by Day 14 and became irreversible by Days 16–18, characterized by falling progesterone, extensive smooth endoplasmic reticulum vacuolation, lipid droplet accumulation, and lysosomal degradation culminating in corpus albicans formation.

Cite This Study

Cavazos et al. (1969) studied this question.

synapsesocial.com/papers/6aa0e623372f0d69599d2824 https://doi.org/10.1095/biolreprod1.1.83

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Implication

Ultrastructural study reveals peak progesterone production coincides with smooth endoplasmic reticulum expansion in gilts, indicating structural dependence of steroidogenesis.

Fine Structure and Progesterone Levels in the Corpus Luteum of the Pig during the Estrous Cycle1, 2

Discussion

Member takes

Implication

Key Points

Cite This Study

Fine Structure and Progesterone Levels in the Corpus Luteum of the Pig during the Estrous Cycle1, 2

Discussion

Member takes

Implication

Key Points

Cite This Study

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