A mule is the result of a horse that has been bred with a donkey. Mules are generally sterile, meaning that they cannot be bred with each other in most cases. They also have 63 chromosomes. In appearance, mules may look very similar to donkeys. They also have stiff hair. Much like donkeys, mules are strong animals and tend to have calmer personalities.
Air Embolism. An air embolism is an obstruction in a vein or artery caused by a bubble of gas. Air enters the circulatory system when the pressure gradient favors movement of air or gas from the environment into the blood. A venous air embolism is the most common form of air embolism.
However, amniotic fluid embolisms are rare â and itâs likely that some amniotic fluid commonly enters the maternal bloodstream during delivery without causing problems. Itâs not clear why in some cases this leads to an amniotic fluid embolism. Further research on what causes amniotic fluid embolisms is needed. Due to the rarity of Amniotic fluid embolisms, it is difficult to identify risk factors. Itâs estimated that there are between 1 and 12 cases of amniotic fluid embolism for every 100,000 deliveries.