The structure that establishes connection between the mother and fetus during intrauterine life is?

UPRVUNL - 2021

Obstetrics & Gynaecology

Easy

Appeared in: UPRVUNL - 2021

Explanation

The placenta is a temporary fetomaternal organ that develops in the uterus during pregnancy.
It serves as the primary interface for the exchange of nutrients, gases (oxygen and carbon dioxide), and waste products between the mother and the developing fetus.
The connection is established via the umbilical cord, which links the fetus to the placenta.
It also functions as an endocrine gland, producing hormones essential for maintaining pregnancy, such as hCG, progesterone, and estrogen.

Option A: The decidua is the modified mucous membrane lining the uterus during pregnancy. It is only the maternal component of the placenta (decidua basalis), not the entire connecting structure which also has a fetal component (chorion).
Option B: The uterus is the muscular organ that contains and supports the developing fetus. The placenta attaches to the wall of the uterus, but the uterus itself is the housing organ, not the specific structure for physiological exchange.
Option D: The vagina is a muscular tube connecting the cervix to the outside of the body. Its functions include serving as the birth canal and receiving sperm during intercourse; it plays no role in the nutritional or respiratory connection between mother and fetus.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy and Physiology of Fetomaternal Connection as background academic context rather than a clinical decision trigger.
Understanding the placenta's function is crucial for antenatal care. Nurses monitor placental health through ultrasound to assess fetal growth and well-being.
Placental abnormalities are significant clinical concerns. Conditions like placenta previa (placenta covering the cervix) and placental abruption (premature separation) can cause severe hemorrhage, threatening both maternal and fetal life.
Placental insufficiency, where the placenta fails to provide adequate nutrients and oxygen, can lead to intrauterine growth restriction (IUGR) and requires close fetal surveillance.

How to Approach the Question

Identify the key terms in the question: 'connection', 'mother', 'fetus', and 'intrauterine life'. The question is asking for the specific anatomical structure that links the two for life support.
Recall the basic anatomy of pregnancy and the function of each listed structure.
Evaluate Option A (Decidua): This is the uterine lining. It's involved, but is it the whole connection? No, it's just the maternal side of the attachment.
Evaluate Option B (Uterus): This is the 'house' for the fetus. The connection happens inside it, but the uterus itself isn't the connecting organ.
Evaluate Option C (Placenta): This is a specialized organ that develops specifically for pregnancy to exchange substances between mother and fetus. This fits the description of a 'connection' for life support.
Evaluate Option D (Vagina): This is the birth canal. It has no role in intrauterine life support.

Concept Tested & Keywords

Qelefi0RhGPdcyeXrgcJkZ

E6 Obstetrics Williams p. 61-84

E6 Histology Inderbir 11e pp. 6-8, 1