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Fergusson reflex. The Ferguson reflex (also called the fetal ejection reflex) is the neuroendocrine reflex comprising the self-sustaining cycle of uterine contractions initiated by pressure at the cervix, more precisely, the internal end of cervix, or vaginal walls. It is an example of positive feedback in biology.
Production and secretion of oxytocin is controlled by a positive feedback mechanism, where its initial release, either naturally or in pharmaceutical form, stimulates production and release of further oxytocin. For example, when oxytocin is released during a contraction of the uterus at the start of childbirth, this stimulates production and ...
Mathematically, positive feedback is defined as a positive loop gain around a closed loop of cause and effect. [1][3] That is, positive feedback is in phase with the input, in the sense that it adds to make the input larger. [4][5] Positive feedback tends to cause system instability. When the loop gain is positive and above 1, there will ...
In either form, oxytocin stimulates uterine contractions to speed up the process of childbirth. In its natural form, it also plays a role in maternal bonding and milk production. [10] [11] Production and secretion of oxytocin is controlled by a positive feedback mechanism, where its initial release stimulates production and release of further ...
Childbirth, also known as labour, parturition and delivery, is the completion of pregnancy where one or more babies exits the internal environment of the mother via vaginal delivery or caesarean section. [7] In 2019, there were about 140.11 million human births globally. [9] In developed countries, most deliveries occur in hospitals, [10][11 ...
In women, hyperprolactinemia is often associated with amenorrhea, a condition that resembles the physiological situation during lactation (lactational amenorrhea). Mechanical detection of suckling increases prolactin levels in the body to increase milk synthesis. Excess prolactin may inhibit the menstrual cycle directly, by a suppressive effect ...
Prenatal and perinatal psychology explores the psychological and psychophysiological effects and implications of the earliest experiences of the individual, before birth (prenatal), as well as during and immediately after childbirth (perinatal). Although there are various perspectives on the topic, a common thread is the importance of prenatal ...
Maternal bond. A human mother holds up her child. Mother sea lion and pup. A mother yellow-bellied marmot kissing her pup. A maternal bond is the relationship between a biological mother / caregiver and her child or baby. While typically associated with pregnancy and childbirth, a maternal bond may also develop in cases later on in life where ...