1. Family Life Cycle -- Information from Healthwise
The emotional and intellectual stages you pass through from childhood to your retirement years as a member of a family are called the family life cycle. The emotional and intellectual stages you pass through from childhood to your retirement...
http://www.everettclinic.com/kbase/topic/special/ty6171/sec1.htm

2. Lice - life cycle of lice -- EMedicineHealth Consumer Information
During the life cycle of lice, the female louse lays eggs, called nits, that attach to the hair shaft close to the scalp or body. Lice infestation on the human body (also known as pediculosis) is very common.
http://www.emedicinehealth.com/articles/13184-8.asp#Multimediamedia1

3. Life Cycle of the Hookworm -- Information from the Merck Manual
Disorders of Nutrition and Metabolism. Liver and Gallbladder Disorders. Hookworm infection (ancylostomiasis) is a disease of the intestines, resulting in anemia and occasionally skin rash, respiratory problems, or abdominal pain.
http://www.merck.com/mmhe/sec17/ch196/ch196g.html#fg196_1