Fetal position during pregnancy

Hughey, Michael John

doi:10.1016/s0002-9378(85)80276-3

Cited by 22 publications

(13 citation statements)

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“…More than 90% of all fetuses are in a longitudinal lie in the 24th gestational week. This period is characterised by frequent changes of presentations [4][5][6][7][8]. The fetuses in breech presentation during this period have the same probability for breech and cephalic presentation at delivery.…”

Section: Probability Of Breech Presentationmentioning

confidence: 99%

“…This period, up to the 24th gesta-tional week, is the period of at random assumed presentation. The incidence of cephalic presentation increases during the second period, lasting from the 25th to the 35th gestational week, with a proportional decrease of breech presentation [4][5][6]. In this period of the gestation incidence of breech presentation is inversely related to gestational age.…”

Section: Probability Of Breech Presentationmentioning

confidence: 99%

“…In the third period from the 36th gestational week onward, the incidence of cephalic and breech presentation insignificantly changes in favour of cephalic presentation. Breech presentation at delivery occurs in 3-4% of all singleton pregnancies [4][5][6].…”

Section: Probability Of Breech Presentationmentioning

confidence: 99%

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Probability of breech presentation and its significance

Sekulić

Mikov

Petrovic

2010

The Journal of Maternal-Fetal & Neonatal Medicine

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Existing data related to the probability of breech presentation suggest that the breech presentation is a consequence of mere filling of the intrauterine space, with the same probability of breech and cephalic presentation. As a consequence, group of cephalic presenting fetuses is heterogeneous. Some fetuses randomly assume the cephalic presentation while others assume cephalic presentation 'intentionally' for a reason. Before comparing breech and cephalic presenting fetuses/newborns, bias should be eliminated by subtracting from the cephalic-presenting group the number of fetuses/newborns that is identical with the number of breech-presenting fetuses/newborns with identical characteristics. The subtracted group should be added to the breech-presenting group before comparison with the remaining cephalic-presenting fetuses/newborns. The comparison should be corrected for the gestational age and according to data that are not influenced by delivery. Data suggest that the physiological process that accounts for 92% of cephalic-presenting human fetuses at delivery should be sought from the 25th gestational week onwards.

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Section: Probability Of Breech Presentationmentioning

confidence: 99%

Section: Probability Of Breech Presentationmentioning

confidence: 99%

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Probability of breech presentation and its significance

Sekulić

Mikov

Petrovic

2010

The Journal of Maternal-Fetal & Neonatal Medicine

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“…By the third trimester, about 85% of fetuses are positioned in the cephalic position in utero (vertically with head down), with the back of the torso situated to the left of the mothers midline (Sørensen, Hasch, & Lange, 1979). The position of the infant at birth highly correlates with the intrauterine position of the fetus in the third trimester for approximately 98% of births (Hughey, 1985).…”

Section: The Vestibular System and Laterality: An Early Connection?mentioning

confidence: 99%

Extending the functional cerebral systems theory of emotion to the vestibular modality: A systematic and integrative approach.

Carmona

Holland

Harrison

2009

Psychological Bulletin

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Throughout history, vestibular and emotional dysregulation have often manifested together in clinical settings, with little consideration that they may have a common basis. Regarding vestibular mechanisms, the role of brainstem and cerebellar structures has been emphasized in the neurological literature, whereas emotion processing in the cerebral hemispheres has been the focus in psychology. A conceptual model is proposed that links research in the 2 disparate fields by means of a functional cerebral systems framework. The claim is that frontal regions exert regulatory control over posterior systems for sensation and autonomic functions in a dense, interconnected network. Impairment at levels within the system is expected to influence vestibular and cognitive processes depending on the extent of frontal regulatory capacity. M. Kinsbourne's (1980) shared cerebral space model specifies the conditions under which dysfunction of the vestibular modality will influence higher cognitive levels. A position on laterality and associative relations within the right hemisphere is proposed to explain links among dizziness, nausea, and negative emotion.

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“…Breech presentation is one of the most common mal-presentation of the fetus in utero, occurring in 3 % to 4 % of all deliveries [1,8,26]. Of the total number of breech deliveries, more than 80 % occur at term, the rest being pre-term [1].…”

Section: Introductionmentioning

confidence: 99%