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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.
As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.
Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.
![Volvulus. A volvulus results when the small intestine twists, causing an obstruction that can lead t](https://biology-forums.com/gallery/47/medium_14755_26_10_12_5_23_54_96901380.jpeg)
![New England children like David, Joanna, and Abigail Mason (painted by an unknown artist around 1670](https://biology-forums.com/gallery/47/medium_374628_15_08_15_11_48_07_222261695.jpeg)