The Ferguson reflex proceeds from mechanical stretch detection by sensory neurons, transmission through the dorsal horn and anterolateral columns to the brain, hypothalamic stimulation of the posterior pituitary, oxytocin release, and myometrial contraction. — Wikipedia
The contractions produced by oxytocin further increase cervical pressure, reinforcing the reflex in a self-sustaining positive feedback loop until delivery occurs. — Wikipedia
Cervical stretch → oxytocin release → stronger contractions → greater stretch
1. What effect does increased uterine oxytocin-receptor density have during labor?
2. How can uterine contractions contribute to fetal expulsion without active maternal pushing?
3. How do oxytocin-induced contractions sustain the Ferguson reflex until delivery?
What initiates the Ferguson reflex during labor?
Pressure-induced stretching of the internal cervix or vaginal walls.
What type of feedback is the Ferguson reflex?
A positive feedback reflex.
Which part of the nervous system detects mechanical stretch in the Ferguson reflex?
Sensory neurons detect mechanical stretch.
What hormone is released due to hypothalamic stimulation in the Ferguson reflex?
Oxytocin is released.
How do oxytocin-induced contractions affect cervical pressure?
They increase cervical pressure further.
What sustains the Ferguson reflex until delivery?
A self-sustaining positive feedback loop.
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