Conjoined Twins and Pregnancy Labor Process
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Questions and Answers

What are the three stages of labor?

  • Effacement and dilation of the cervix, delivering the fetus, delivering the placenta and fetal membranes (correct)
  • Rupture of amniotic fluid, crowning, and placental expulsion
  • Initiation, effacement, and amniotic rupture
  • Dilation, contractions, and placental expulsion

What name is given to the condition where there is too much space (fluid accumulation) in the amniotic cavity?

  • Anencephaly
  • Hydrocephalus
  • Amniotic band syndrome
  • Polyhydramnios (correct)

What is the significance of having one amnion, one chorion, and one placenta for conjoined twins?

  • It increases the risk of infection
  • It indicates the twins are not truly identical (correct)
  • It suggests the twins are of the opposite gender
  • It reduces the chances of survival

What stage of labor involves effacement and dilatation of the cervix?

<p>First stage (B)</p> Signup and view all the answers

What term is used to describe structural, behavioral, functional, and metabolic disorders present at birth?

<p>Birth defects (A)</p> Signup and view all the answers

What is the role of the placenta with respect to protecting the fetus from toxic factors?

<p>It acts as a barrier and provides full protection (D)</p> Signup and view all the answers

During which weeks of gestation does physiological umbilical herniation occur?

<p>6th to 10th (D)</p> Signup and view all the answers

What is the name of the defect associated with loops of bowel herniating into the umbilical cord?

<p>Omphalocele (C)</p> Signup and view all the answers

What type of membrane covers the bowel in an omphalocele?

<p>Amnion (C)</p> Signup and view all the answers

Which structure develops from visceral (splanchnic) mesoderm?

<p>Septum transversum (C)</p> Signup and view all the answers

What is the name of the cavity that forms between the septum transversum and the stalk of the yolk sac?

<p>Intraembryonic body cavity (A)</p> Signup and view all the answers

What is the name of the fold that forms when the cranial end of the embryo grows and curves?

<p>Cranial neural fold (C)</p> Signup and view all the answers

What structures hold the neural and gut tubes together during embryonic development?

<p>Mesoderm (B)</p> Signup and view all the answers

What is the space between the visceral and parietal layers of the lateral plate mesoderm called?

<p>Primitive body cavity (A)</p> Signup and view all the answers

Which structure forms the amnion that surrounds the embryo during development?

<p>Lateral plate mesoderm (B)</p> Signup and view all the answers

What can happen if the ventral body wall fails to close properly during development?

<p>Ectopia cordis (C)</p> Signup and view all the answers

Which layer of the lateral plate mesoderm forms the visceral layer of the serous membranes?

<p>Visceral layer (B)</p> Signup and view all the answers

What is the region of attachment between the gut tube and the yolk sac known as?

<p>Vitelline duct (A)</p> Signup and view all the answers

What condition occurs when loops of bowel fail to return to the body cavity during gestation?

<p>Omphalocele (D)</p> Signup and view all the answers

What is the name of the thick mesodermal tissue between the thoracic cavity and the yolk sac?

<p>Septum transversum (B)</p> Signup and view all the answers

Which membrane covers the bowel in an omphalocele?

<p>Amnion (C)</p> Signup and view all the answers

What structure forms the amnion that surrounds the embryo during development?

<p>Septum transversum (D)</p> Signup and view all the answers

What can be associated with an omphalocele, in addition to the actual herniation of the bowel?

<p>Chromosome abnormalities (A)</p> Signup and view all the answers

What is the name of the phase when loops of bowel herniate into the umbilical cord during gestation?

<p>Physiological umbilical herniation (B)</p> Signup and view all the answers

What is the term used to describe the process where the lateral body wall folds move ventrally and fuse in the midline?

<p>Pleuropericardial folding (B)</p> Signup and view all the answers

Failure of the ventral body wall to close properly during development can lead to which of the following defects?

<p>Gastroschisis (D)</p> Signup and view all the answers

Which structure forms the umbilical cord during development?

<p>Connecting stalk (A)</p> Signup and view all the answers

What is the space between the visceral and parietal layers of lateral plate mesoderm called?

<p>Intraembryonic cavity (D)</p> Signup and view all the answers

What defect is associated with loops of bowel herniating outside the abdominal cavity into the umbilical cord region?

<p>Omphalocele (B)</p> Signup and view all the answers

During development, which layer of mesoderm forms the visceral layer of the serous membranes covering abdominal organs?

<p>Splanchnic mesoderm (C)</p> Signup and view all the answers

What are the three stages of labor?

<p>Effacement and dilatation of the cervix, delivery of the fetus, delivery of the placenta and fetal membranes (C)</p> Signup and view all the answers

What term is used to describe disorders present at birth relating to structure, behavior, function, and metabolism?

<p>Congenital anomalies (C)</p> Signup and view all the answers

What structural feature is common in conjoined twins regarding the membranes and placenta?

<p>One amnion, one chorion, and one placenta (C)</p> Signup and view all the answers

What initiates the beginning of labor in most cases?

<p>Signals that are not clearly understood (C)</p> Signup and view all the answers

What is the medical term for the condition of fluid accumulation in the amniotic cavity as seen on an ultrasound?

<p>Hydramnios (B)</p> Signup and view all the answers

What is the role of the placenta concerning the protection of the fetus from toxic factors?

<p>Acts as a selective filter for certain toxic substances (D)</p> Signup and view all the answers

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