Asynclitic birth: Difference between revisions

Latest revision as of 19:26, 22 March 2025

A type of childbirth where the baby's head is tilted to the side

Asynclitic birth is a term used in obstetrics to describe a situation during childbirth where the fetal head is tilted to the side, causing the sagittal suture to be misaligned with the pelvic inlet. This can affect the progress of labor and may require medical intervention.

Overview[edit]

During a typical labor, the fetal head is expected to engage in the pelvis in a position where the sagittal suture is aligned with the pelvic inlet. In an asynclitic birth, the head is tilted, causing the sagittal suture to be closer to either the pubic symphysis or the sacrum. This misalignment can lead to difficulties in the descent of the fetal head through the birth canal.

Causes[edit]

Asynclitic birth can be caused by several factors, including:

Pelvic shape: Variations in the shape of the maternal pelvis can contribute to asynclitism.
Fetal position: The position of the fetus in the uterus can affect the alignment of the head.
Uterine contractions: The strength and pattern of contractions can influence the position of the fetal head.

Diagnosis[edit]

Asynclitic birth is typically diagnosed during a vaginal examination by a healthcare provider. The examiner may feel the sagittal suture closer to one side of the pelvis, indicating a tilted head. Ultrasound imaging can also be used to assess the position of the fetal head.

Management[edit]

Management of asynclitic birth depends on the severity of the tilt and the progress of labor. Options include:

Maternal positioning: Changing the position of the mother, such as using a hands-and-knees position, can help realign the fetal head.
Manual rotation: A healthcare provider may attempt to manually rotate the fetal head to a more favorable position.
Operative delivery: In some cases, an assisted delivery using forceps or vacuum extraction may be necessary. If these methods are unsuccessful, a cesarean section may be required.

Complications[edit]

Asynclitic birth can lead to prolonged labor, increased maternal fatigue, and a higher likelihood of operative delivery. It may also increase the risk of fetal distress and birth trauma.

Prognosis[edit]

With appropriate management, most cases of asynclitic birth can be resolved successfully, resulting in a healthy outcome for both mother and baby. Early recognition and intervention are key to minimizing complications.

Related pages[edit]

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-An '''asynclitic birth''' or '''asynclitism''' refers to the [[Pelvimetry|position]] of a [[fetus]] in the [[uterus]] such that the head of the baby is presenting first and is tilted to the shoulder,<ref name="spinningbabies">[http://www.spinningbabies.com/baby-positions/all-positions/asynclitism Asynclitism], spinningbabies.com</ref> causing the fetal head to no longer be in line with the [[birth canal]] (vagina).<ref name=Healthline>[http://www.healthline.com/yodocontent/pregnancy/assisted-delivery-types-forceps.html Healthline > Types of Forceps Used in Delivery] February 2006. Reviewer: Douglas Levine, Gynecology Service/Department of Surgery, [[Memorial Sloan Kettering Cancer Center]], New York, NY.</ref> Asynclitic presentation is significantly different from a [[shoulder presentation]], in which the shoulder is presenting first. Many babies enter the pelvis in an asynclitic presentation, and most asynclitism corrects spontaneously as part of the normal birthing process. Persistence of asynclitism can cause problems with [[dystocia]], and has often been associated with [[cesarean]] birth. However, with a skilled [[midwife]] or [[obstetrician]] a complication-free [[vaginal birth]] can sometimes, though not necessarily, be achieved through movement and positioning of the birthing woman,<ref name="Simkin 2011">{{cite book|last=Simkin|first=Penny|title=The Labor Progress Handbook: Early Interventions to Prevent and Treat Dystocia (3rd ed.)|year=2011|publisher=John Wiley & Sons|url=https://books.google.com/books/about/The_Labor_Progress_Handbook.html?id=HHodimrcuA0C}}</ref> and patience and extra time to allow for movement of the baby through the pelvis and moulding of the skull during the birthing process if this is safe in the circumstances.<ref name="Simkin 2011"/>
+{{Short description|A type of childbirth where the baby's head is tilted to the side}}
-Where intervention is the safest option in asynclitic birth, [[Kielland forceps]] are preferable [[obstetric forceps]] used in asynclitic births, for example by their sliding mechanism, availing for more appropriate adjustment of the blades.<ref name="Healthline"/>
+'''Asynclitic birth''' is a term used in [[obstetrics]] to describe a situation during [[childbirth]] where the [[fetal head]] is tilted to the side, causing the [[sagittal suture]] to be misaligned with the [[pelvic inlet]]. This can affect the progress of labor and may require medical intervention.
-==See also==
+==Overview==
-*[[Childbirth]]
+During a typical [[labor]], the fetal head is expected to engage in the pelvis in a position where the sagittal suture is aligned with the pelvic inlet. In an asynclitic birth, the head is tilted, causing the sagittal suture to be closer to either the [[pubic symphysis]] or the [[sacrum]]. This misalignment can lead to difficulties in the descent of the fetal head through the birth canal.
-*[[Naegele obliquity]]
-==References==
+==Causes==
-{{reflist}}
+Asynclitic birth can be caused by several factors, including:
+* [[Pelvic shape]]: Variations in the shape of the maternal pelvis can contribute to asynclitism.
+* [[Fetal position]]: The position of the fetus in the uterus can affect the alignment of the head.
+* [[Uterine contractions]]: The strength and pattern of contractions can influence the position of the fetal head.
-==External links==
+==Diagnosis==
-*[http://www.who.int/reproductive-health/impac/Symptoms/Malpositions__malpresetations_S69_S81.html Malpositions and malpresentations], [[World Health Organization]]'s  Managing Complications in Pregnancy and Childbirth, A guide for midwives and doctors
+Asynclitic birth is typically diagnosed during a [[vaginal examination]] by a healthcare provider. The examiner may feel the sagittal suture closer to one side of the pelvis, indicating a tilted head. [[Ultrasound]] imaging can also be used to assess the position of the fetal head.
-*{{cite journal |vauthors=Siciliano G, Marchiafava G |title=[Asynclitic ventral shoulder presentation; two cases with deflection and epidural hemorrhage] |language=Italian |journal=Monit Ostet Ginecolog |volume=23 |issue=4 |pages=233–55 |year=1952 |pmid=13025351 }}
+==Management==
+Management of asynclitic birth depends on the severity of the tilt and the progress of labor. Options include:
+* [[Maternal positioning]]: Changing the position of the mother, such as using a hands-and-knees position, can help realign the fetal head.
+* [[Manual rotation]]: A healthcare provider may attempt to manually rotate the fetal head to a more favorable position.
+* [[Operative delivery]]: In some cases, an [[assisted delivery]] using [[forceps]] or [[vacuum extraction]] may be necessary. If these methods are unsuccessful, a [[cesarean section]] may be required.
+==Complications==
+Asynclitic birth can lead to prolonged labor, increased maternal fatigue, and a higher likelihood of operative delivery. It may also increase the risk of [[fetal distress]] and [[birth trauma]].
+==Prognosis==
+With appropriate management, most cases of asynclitic birth can be resolved successfully, resulting in a healthy outcome for both mother and baby. Early recognition and intervention are key to minimizing complications.
+==Related pages==
+* [[Childbirth]]
+* [[Labor (obstetrics)]]
+* [[Fetal position]]
+* [[Pelvic inlet]]
+* [[Cesarean section]]
-[[Category:Presentations and positions in childbirth]]
-[[Category:Midwifery]]
 [[Category:Obstetrics]]
-{{dictionary-stub1}}
+[[Category:Childbirth]]