When the birth process is normal the placenta comes after the foal
The so-called “red bag”-syndrome is due to a placental disruption. The placenta separates prematurely shortly before or during birth. The villus (chorion) of the placenta enters the birth canal before the embryo and “blocks” it. In this case, you have to react very quickly: With a pair of scissors or a knife, the skin must be severed immediately, and you have to try to pull the foal out carefully, otherwise it threatens to suffocate.
The velvety, reddish-colored villi skin is quite thick and does not break under the contractions. Due to its appearance, this incident is referred to by the term “red bag” or “red balloon”