Related Experiment Videos
The function of the growing follicle
Journal of Reproduction and Fertility
|December 1, 1975
Summary
Ovarian follicle development is crucial for reproduction, with gonadotropins like FSH and LH driving key changes. These hormones regulate oocyte maturation, steroidogenesis, and the formation of essential follicular structures.
Area of Science:
- Reproductive Biology
- Endocrinology
- Cellular Biology
Background:
- The ovarian follicle is central to oocyte maturation, release, and steroidogenesis.
- Follicular development involves complex changes for functional competence.
- Rodent models provide insights into postnatal follicular development.
Purpose of the Study:
- To discuss the developmental changes enabling follicular functional competence.
- To elucidate the roles of gonadotropins in follicular growth and differentiation.
- To explain ovarian physiological events based on observed follicular development.
Main Methods:
- Observation of postnatal follicular development in rodents.
- Analysis of gonadotropin (FSH and LH) stimulation effects.
- Assessment of steroidogenic enzyme activity and receptor expression.
Main Results:
- Follicular development becomes gonadotropin-dependent around day 5.
- Theca layer, zona pellucida, and vascularization develop within the 2nd week.
- FSH drives granulosa cell proliferation; FSH/LH synergism enhances theca, vascularization, and steroidogenesis.
Conclusions:
- Gonadotropins orchestrate critical stages of ovarian follicle development.
- Synergistic action of FSH and LH is vital for advanced follicular maturation.
- Ovarian steroids locally modulate follicular growth and gonadotropin feedback.