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Ovarian Cycle01:27

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The menstrual cycle includes a critical component known as the ovarian cycle, which undergoes two main phases each month—the follicular phase and the luteal phase. The follicular phase is variable and averaging around 14 days. Ovulation, triggered by a surge in luteinizing hormone (LH), marks the transition between the two phases. The second phase, the luteal phase, is relatively consistent, lasting approximately 14 days, and is marked by the activity of the corpus luteum. While a cycle...
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The ovarian cycle is meticulously regulated by the hypothalamic-pituitary-gonadal axis. This cycle orchestrates the release of a mature oocyte, essential for reproduction.
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Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
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The Ovarian Cycle.

JoAnne S Richards1

  • 1Baylor College of Medicine, Houston, TX, United States; Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, United States; Center for Reproductive Medicine, Baylor College of Medicine, Houston, TX, United States.

Vitamins and Hormones
|March 17, 2018
PubMed
Summary
This summary is machine-generated.

The ovarian cycle is a complex endocrine system influencing reproductive events and hormone production. Recent developments highlight its impact on epithelial cancers in the ovary, uterus, cervix, and breast.

Keywords:
ApoptosisFolliclesGranulosa cell tumorsHypothalamus–pituitary axisImplantationOvarian cancerOvaryOvulationPCOSPOFPregnancyUterine biology

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Area of Science:

  • Reproductive Endocrinology
  • Gynecologic Oncology

Background:

  • The ovarian cycle is a dynamic endocrine process involving the hypothalamus, pituitary gland, and ovaries.
  • It regulates reproductive events, including uterine, cervical, and breast development.
  • Ovarian steroid hormones are implicated in the pathogenesis of epithelial cancers.

Purpose of the Study:

  • To provide a personal perspective on recent advancements in understanding the ovarian cycle.
  • To explore the intricate endocrine interactions within the ovarian cycle.
  • To discuss the role of the ovarian cycle in epithelial cancer development.

Main Methods:

  • This chapter offers a review and personal insights into recent research.
  • It synthesizes information on endocrine interactions and cellular changes.
  • Focuses on developments in ovarian, uterine, cervical, and breast tissues.

Main Results:

  • Recent developments reveal complex hypothalamic-pituitary-ovarian interactions.
  • The ovarian cycle significantly influences endometrial and myometrial changes.
  • Steroid hormones produced during the ovarian cycle are key factors in epithelial cancer development.

Conclusions:

  • The ovarian cycle is a critical endocrine system with far-reaching effects.
  • Understanding its complexities is crucial for reproductive health and cancer prevention.
  • Further research into this endocrine environment holds promise for therapeutic strategies.