Related Experiment Video

Updated: Aug 3, 2026

A Tissue Culture Model of Estrogen-producing Primary Bovine Granulosa Cells
05:36

A Tissue Culture Model of Estrogen-producing Primary Bovine Granulosa Cells

Published on: September 6, 2018

Proteins secreted by day-16 to -18 bovine conceptuses extend corpus luteum function in cows

J J Knickerbocker, W W Thatcher, F W Bazer

    Journal of Reproduction and Fertility
    |July 1, 1986
    PubMed

    More Related Videos

    In Vitro Culture Strategy for Oocytes from Early Antral Follicle in Cattle09:30

    In Vitro Culture Strategy for Oocytes from Early Antral Follicle in Cattle

    Published on: July 8, 2020

    A Modified Co-Culture System for Understanding Granulosa-Theca Cell Interactions in the Bovine Ovary07:03

    A Modified Co-Culture System for Understanding Granulosa-Theca Cell Interactions in the Bovine Ovary

    Published on: September 19, 2025

    Related Concept Videos

    Ovarian Cycle01:27

    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...
    Hormonal Control of the Ovarian Cycle01:30

    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...
    Proliferative Phase01:20

    Proliferative Phase

    The proliferative phase typically occurs after menstruation and lasts between 6 to 13 days in a standard 28-day cycle. This phase involves the reconstruction of the endometrium, guided by estrogen produced by the developing ovarian follicle.
    Notably, the stratum basale, the basal layer of the endometrium, including the basal parts of the uterine glands, remains unaffected by menstruation. Stem cells in this layer undergo mitosis, regenerating the stratum functionalis and thickening the...
    Secretory Phase01:19

    Secretory Phase

    The secretory phase of the menstrual cycle, spanning from day 14 to 28 in a typical 28-day cycle, is a period of significant physiological changes in the female reproductive system. This phase commences immediately after ovulation and is characterized by the preparation of the endometrium for potential embryo implantation.
    Following ovulation, the corpus luteum, a temporary endocrine structure, produces progesterone and estrogens. These hormones stimulate the growth and coiling of endometrial...