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.
This is due to the greatly reduced number of genetically normal eggs remaining in the ovaries of a woman over forty. The pregnancy risk for women in their early 40âs is again much higher, with miscarriage rates at roughly 35%, and the risk of Downs syndrome about 1/38.For this reason many women in their 40âs choose to use an egg donor to become pregnant, with success rates of about 80% per cycle.here is a very sharp decline in a womanâs ability to fall pregnant once over the age of 40. The fertility rate per month is only about 5% per month and even with IVF the pregnancy rate is only about 10% per try.