THE TERM “ZONE OF ALTERED MORPHOLOGY” REFERS TO

• A. The zone of amnion, chorion, and decidua in the edge of the placental mass
• B. The zone of amnion, chorion, and decidua at the midpoint between the placental mass at the site of rupture of membranes
• C. The zone of amnion, chorion, and decidua close to the endocervix that undergoes morphologic changes
  before the onset of labor ✓
• D. The area of amnion, chorion, and decidua formed after the application of platelets and cryoprecipitate to seal the membranes
• E. None of the above

The term “zone of altered morphology” refers to the area of amnion, chorion, and decidua close to the endocervix that undergoes morphologic changes before the onset of labor. This zone is characterized by changes in structure and composition as parturition approaches. It plays a crucial role in the initiation of labor and the process of cervical ripening.

In other words, the term “zone of altered morphology” refers to the region near the endocervix where the amnion, chorion, and decidua undergo morphological changes in preparation for labor. This zone is significant as it plays a crucial role in the initiation of labor and the process of childbirth.

Amnion, Chorion, and Decidua

The amnion, chorion, and decidua are essential components of the fetal membranes that surround and protect the developing fetus during pregnancy. The amnion is the innermost layer that directly surrounds the fetus and contains the amniotic fluid. The chorion is the outermost fetal membrane that contributes to the formation of the placenta. The decidua is the maternal part of the placenta that lines the uterus.

Morphologic Changes Before Labor

Before the onset of labor, the zone of altered morphology undergoes specific changes in its structure and composition. These changes include alterations in cell types, extracellular matrix remodeling, increased vascularization, and inflammatory responses. These morphological changes are believed to be essential for preparing the cervix for dilation and facilitating the process of labor.

Role in Labor Initiation

The zone of altered morphology is thought to be involved in signaling pathways that trigger uterine contractions and cervical ripening. The morphological changes in this region help to soften and dilate the cervix, allowing for the passage of the fetus through the birth canal. Additionally, these changes may also contribute to promoting inflammation and immune responses necessary for labor initiation.

Conclusion

In conclusion, the zone of altered morphology refers to a critical area near the endocervix where significant morphological changes occur before labor. These changes play a vital role in preparing the cervix for childbirth by facilitating cervical ripening and uterine contractions.