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OBG · Labour and delivery: Matthews Duncan placenta
Sample itemDuring the third stage, the placenta is expelled with its rough maternal surface presenting first, and the membranes trail behind. Which mechanism of placental separation is this?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
C. Matthews Duncan
In the Matthews Duncan method, separation begins at the lower edge so the maternal surface presents first, with more bleeding before expulsion. In the Schultze method the central area separates first and the shiny fetal surface presents, with bleeding concealed behind the placenta.
Option by option
A. Ritgen manoeuvre
The Ritgen manoeuvre controls delivery of the fetal head and is unrelated to the placenta.
B. Schultze method
In the Schultze method, the shiny fetal surface presents first.
C. Matthews Duncan (correct)
Correct. Edge-first separation presents the rough maternal surface, as in Matthews Duncan expulsion.
D. Brandt-Andrews method
Brandt-Andrews is the technique of controlled cord traction with counter-pressure, not a mechanism of separation.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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