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Ovarian Cycle

Ovarian Cycle

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 length...

Oogenesis

Oogenesis

In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...

Oogenesis

Oogenesis

Oogenesis, the process of developing egg cells (female gametes), occurs within the ovaries and is fundamental to female fertility. This sequence begins during fetal development when diploid oogonia in the developing ovaries undergo mitotic divisions to produce primary oocytes. By birth, these primary oocytes enter prophase I of meiosis but become arrested in this stage, remaining suspended until puberty.
Each primary oocyte is surrounded by a layer of pre-granulosa cells, forming what is known...

Ovaries

Ovaries

The ovaries are roughly the size of almonds and measure approximately 2 to 3 centimeters in length. These paired structures are situated within the pelvic region and are anchored by the mesovarium—a peritoneal extension that also connects them to the wider structure of the broad ligament. The support system extends to the suspensory ligament, housing blood and lymphatic vessels. In addition, the ovarian ligament tethers the ovaries to the uterus.
On the ovarian surface, a layer of cuboidal...

Hormonal Control of the Ovarian Cycle

Hormonal Control of the Ovarian Cycle

The ovarian cycle is meticulously regulated by the hypothalamic-pituitary-gonadal axis. This cycle orchestrates the release of a mature oocyte, essential for reproduction.
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...

Disorders of the Female Reproductive System

Disorders of the Female Reproductive System

The female reproductive system can be affected by several disorders, including Premenstrual Syndrome (PMS), Premenstrual Dysphoric Disorder (PMDD), endometriosis, and various forms of cancer. PMS and PMDD are cyclical conditions that cause physical and emotional distress, with symptoms that include edema, mood swings, and food cravings. PMDD is a more severe form of PMS characterized by increased symptom severity that peaks during the luteal phase and tends to improve or resolve shortly after...

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Related Experiment Video

Updated: Jul 5, 2026

An Ex Vivo Model of Ovarian Cancer Peritoneal Metastasis Using Human Omentum

An Ex Vivo Model of Ovarian Cancer Peritoneal Metastasis Using Human Omentum

Published on: January 26, 2024

Ovarian pregnancy.

S Das¹, R Kalyani, V Lakshmi

¹Department of Pathology, Sri Devaraj Urs Medical College, Kolar 563 101, Karnataka, India. lifepathology@rediffmail.com

Indian Journal of Pathology & Microbiology

|April 18, 2008

Summary

This summary is machine-generated.

Ovarian pregnancy, a rare ectopic pregnancy, is reported in a 23-year-old female. This case highlights the importance of considering ovarian implantation in diagnosing rare ectopic pregnancies.

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Area of Science:

Reproductive Medicine
Gynecology
Obstetrics

Background:

Ectopic pregnancy, particularly ovarian pregnancy, represents a rare clinical challenge.
Ovarian pregnancies account for less than 3% of all ectopic gestations, necessitating awareness among clinicians.

Observation:

A case study of a 23-year-old female presenting with an ovarian pregnancy is detailed.
The clinical presentation and diagnostic considerations for this rare condition are highlighted.

Findings:

The study confirms an instance of ovarian pregnancy, a rare subtype of ectopic gestation.
This case contributes to the limited literature on ovarian implantation, offering insights into its occurrence.

Implications:

Early and accurate diagnosis of ovarian pregnancy is crucial for appropriate management and patient outcomes.
Increased awareness of rare ectopic pregnancy presentations, such as ovarian implantation, can improve diagnostic accuracy in reproductive medicine.