Related Experiment Video
Updated: May 10, 2026

Protocol for Studying Extinction of Conditioned Fear in Naturally Cycling Female Rats
Published on: February 23, 2015
Discussion: 'Adherence to hormonal contraception among women veterans,' by Borrero et al
George A Macones1, Alison Cahill, Anthony O Odibo
1Department of Obstetrics and Gynecology, Washington University in St. Louis, St. Louis, MO, USA.
Abstract:
In the roundtable that follows, clinicians discuss a study published in this issue of the Journal in light of its methodology, relevance to practice, and implications for future research. Article discussed: Borrero S, Zhao X, Mor MK, et al. Adherence to hormonal contraception among women veterans: differences by race/ethnicity and contraceptive supply. Am J Obstet Gynecol 2013;209:103.e1-11.
Related Concept Videos
Birth Control Methods
Hormonal Regulation
Hormonal Regulation
Hormonal Regulation of the Menstrual Cycle
At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH release.
Hormonal Regulation of Blood Pressure
Epinephrine and Norepinephrine
The adrenal medulla releases epinephrine and norepinephrine, catecholamines that enhance and extend the sympathetic or "fight or flight" physiological response. These hormones escalate heart rate and the force of contraction while...
Intrauterine Drug Delivery Systems

