See cancer for the biology of the disease, as well as a list of malignant diseases. Oncology is a branch of medicine that deals with the prevention, diagnosis and treatment of cancer. A medical professional who practices oncology is an oncologist. The name's etymological origin is the Greek word á½Î³ÎºÎ¿Ï (Ã³nkos), meaning tumor, volume or mass.
1 An increase in maternal age affects the chances of miscarriage. 2  Women under the age of 35 yrs old have about a 15% chance of miscarriage. 3  Women who are 35-45 yrs old have a 20-35% chance of miscarriage. 4  Women over the age of 45 can have up to a 50% chance of miscarriage.
Based on statistical findings, between 10 and 20 percent of expectant mothers have a miscarriage at 5 weeks. Again, research findings indicate that most of miscarriages (about 80 percent) occur before the pregnancy is 12 weeks old.However, the loss of fetus after fertilization and before implantation cannot be referred to as a miscarriage.he occurrence of a miscarriage five weeks into the pregnancy may be misdiagnosed as a late period. This is because five weeks after implantation is approximately a week after the missed period.