Final answer:
The Lannisters likely died from carbon monoxide poisoning. Cersei may be experiencing metabolic acidosis due to excessive vomiting. Samwell's habits of wearing tight briefs and soaking in a hot tub can negatively affect fertility. Yara's miscarriages may be due to insufficient progesterone.
Step-by-step explanation:
The Lannister family likely died from carbon monoxide poisoning caused by the squirrel's nest in their chimney. Carbon monoxide is a colorless, odorless gas that can be released when organic matter, such as a squirrel's nest, is burned. It can cause symptoms like headache, confusion, weakness, and ultimately death.
In Cersei's case, her symptoms suggest that she may be experiencing metabolic acidosis, a condition characterized by an imbalance in the body's acid-base balance. Her excessive vomiting can lead to dehydration and the loss of electrolytes like sodium and potassium. The body may attempt to compensate for the acidosis by hyperventilation, which increases the breathing rate.
Samwell's habits of wearing tight briefs and soaking in a hot tub can have a negative impact on fertility. The heat from the hot tub can raise the temperature of the testicles, which can reduce sperm production and motility. Wearing tight briefs can also increase scrotal temperature, further affecting sperm quality.
In Yara's case, progesterone may be the vital hormone that is insufficient and contributing to her miscarriages. Progesterone plays a crucial role in maintaining pregnancy by supporting the growth and development of the uterus lining. Insufficient levels of progesterone can lead to early miscarriages.