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Related Concept Videos

Mathematical Induction01:29

Mathematical Induction

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Mathematical induction is a structured method of proof used to confirm the truth of statements involving natural numbers. Consider the sum of the first n natural numbers:This formula describes a pattern that appears to hold true as more terms are added. To verify that it is valid for all natural numbers, mathematical induction proceeds in two essential steps. The first is the base case, where the formula is tested for the initial value, typically n = 1. Substituting into both sides confirms the...
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Inductive Reasoning00:59

Inductive Reasoning

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Inductive reasoning is a form of logical thinking that uses related observations to arrive at a general conclusion. It is uncertain and operates in degrees to which the conclusions are credible. As such, inductive arguments can be weak or strong, rather than valid or invalid, and conclusions can be used to formulate testable, falsifiable hypotheses.
Inductive reasoning is common in descriptive science. A life scientist makes observations and records them. This data can be qualitative or...
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Quantitative Aspects of Drug-Receptor Interaction01:30

Quantitative Aspects of Drug-Receptor Interaction

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The receptor occupancy theory connects a drug's response to the number of occupied receptors. With higher drug concentrations, more receptors are occupied, leading to increased responses. The formation of drug-receptor complexes involves association and dissociation rates, which reach equilibrium when the forward and backward reactions are equal. The equilibrium association constant (Ka) and its inverse, the equilibrium dissociation constant (Kd), indicate drug affinity. Higher Ka and lower...
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Induction01:16

Induction

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An emf is induced when the magnetic field in a coil is changed by pushing a bar magnet into or out of the coil. emfs of opposite signs are produced by motion in opposite directions, and the directions of emfs are also reversed by reversing poles. The same results are produced if the coil is moved rather than the magnet—it is the relative motion that is important. The faster the motion, the greater the emf. Additionally, there is no emf when the magnet is stationary relative to the coil.
A...
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Self-Inductance01:24

Self-Inductance

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Mutual inductance arises when a current in one circuit produces a changing magnetic field that induces an emf in another circuit. On the other hand, self-inductance arises when the current passing through the circuit changes, creating a changing magnetic flux, resulting in inductance in the same circuit.
Consider a circuit connected to an AC source. As the current varies with time, the magnetic flux through the circuit correspondingly changes. Faraday's law tells us that an emf would...
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Mutual Inductance01:24

Mutual Inductance

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Inductance is the property of a device that tells us how effectively it induces an emf in another device. In other words, it is a physical quantity that expresses the effectiveness of a given device.
When two circuits carrying time-varying currents are close to one another, the magnetic flux through each circuit varies because of the changing current in the other circuit. Consequently, an emf is induced in each circuit by the changing current in the other. Therefore, this type of emf is called...
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Related Experiment Video

Updated: Feb 12, 2026

Unraveling the Role of Discrete Areas of the Rat Brain in the Regulation of Ovulation through Reversible Inactivation by Tetrodotoxin Microinjections
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Induction of ovulation: historical aspects.

B Lunenfeld, V Insler

    Bailliere'S Clinical Obstetrics and Gynaecology
    |September 1, 1990
    PubMed
    Summary

    Advances in understanding reproductive processes and growth factors are refining infertility treatments. New knowledge on gonadotrophins and GnRH analogues improve ovulation induction and personalized therapies for infertile patients.

    Area of Science:

    • Reproductive Endocrinology
    • Infertility Research
    • Assisted Reproductive Technologies

    Background:

    • Infertility affects millions of women, with a significant number entering the infertile population annually.
    • Historically, only 40% of infertile patients benefited from ovulation induction; assisted reproduction has increased this to 80%.

    Purpose of the Study:

    • To review the regulation of follicular development, focusing on new findings.
    • To explore the potentiating effects of growth hormone and growth factors on ovarian sensitivity to Follicle-Stimulating Hormone (FSH).
    • To discuss how new knowledge refines clinical approaches to functional infertility treatment.

    Main Methods:

    • Review of recent scientific literature on reproductive processes and infertility.
    • Analysis of the role of growth hormone and growth factors in ovarian response to FSH.

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    Historical View and Physiology Demonstration at the NMJ of the Crayfish Opener Muscle
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    In Vitro Ovule Cultivation for Live-cell Imaging of Zygote Polarization and Embryo Patterning in Arabidopsis thaliana
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    Historical View and Physiology Demonstration at the NMJ of the Crayfish Opener Muscle
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  • Examination of the impact of Gonadotropin-Releasing Hormone (GnRH) analogues on infertility treatment.

    • Main Results:

    • Growth hormone and growth factors enhance ovarian sensitivity to FSH.
    • Potent GnRH analogues are available for clinical use.
    • Understanding reproductive mechanisms leads to better therapy choices.

    Conclusions:

    • Advances in understanding reproductive mechanisms and causes of infertility enable optimal selection of routine therapies.
    • Personalized ovulation induction protocols can be designed for non-responsive patients.
    • The clinical approach to functional infertility is being refined by new knowledge.