Ovulation Trigger

The ovulation trigger is the hormonal signal that causes a mature ovarian follicle to release an oocyte, making it a central event in the reproductive cycle. As estrogen levels rise, they stimulate the hypothalamus and pituitary gland to produce a surge of luteinizing hormone (LH); this surge promotes follicle rupture and oocyte release, typically followed by formation of the corpus luteum. Understanding this process helps explain menstrual-cycle timing, fertility, and reproductive disorders. In clinical biology, monitoring or medically inducing the ovulation trigger supports fertility assessment and assisted reproductive treatments by coordinating oocyte retrieval or timed insemination.

Ovulation Trigger - Related Videos

Research

JoVE Journal - Developmental Biology

In Vitro Ovule Cultivation for Live-cell Imaging of Zygote Polarization and Embryo Patterning in Arabidopsis thaliana

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Cited by 27 •

2017

This manuscript describes an in vitro ovule cultivation method that enables live-cell imaging of Arabidopsis zygotes and embryos. This method is utilized to visualize the intracellular dynamics during zygote polarization and the cell fate specification in developing embryos.

Microinjection of Tetrodotoxin into the Brain of an Awake Female Rat to Inhibit Ovulation

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2025

Source: Silva, C. et al. Unraveling the Role of Discrete Areas of the Rat Brain in the Regulation of Ovulation through Reversible Inactivation by Tetrodotoxin Microinjections. J. Vis. Exp. (2020)This video demonstrates the protocol for microinjection of tetrodotoxin (TTX) into the hypothalamus of a freely moving rat to transiently inhibit neuronal activity, suppress gonadotropin-releasing hormone secretion, and prevent ovulation.

Embryo Transfer Into Rabbit: A Procedure for Laparoscopy-Guided Transfer of Embryos Into Oviduct of Ovulating Recipient Female Rabbit Model

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2025

This video describes the technique of transferring embryos into the oviduct of a recipient female rabbit via Laparoscopy. It allows embryo remodeling in rabbits during its migration through the oviduct, eventually helping in successful implantation. This technique can also be used for stored embryos with good efficiency.

Triggering a Closed-Loop Stimulation by Neuron Spiking Activity

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2025

This video demonstrates the operation of closed-loop stimulation in a rat with a surgically implanted device to record neural activity. Neuronal signals are first recorded and analyzed. Template waveforms are then uploaded, and parameters are defined to trigger closed-loop stimulation.

Research

JoVE Journal - Biology
Free Sample

RNAi Trigger Delivery into Anopheles gambiae Pupae

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Cited by 9 •

2016

RNA interference (RNAi) is an extremely valuable tool for uncovering gene function. However, the ability to target genes using RNAi during pre-adult stages is limited in the major human malaria vector Anopheles gambiae. We describe an RNAi protocol to reduce gene function via direct injection during pupal development.

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