Medical conditions known to cause swelling that affects both legs equally include heart disease, kidney disease, liver disease, and chronic sleep apnea, and complications of diabetes. Premenstrual syndrome (PMS) is also a well-known cause of swelling in the ankles and feet.
Definition of serendipity for English Language Learners. : luck that takes the form of finding valuable or pleasant things that are not looked for.
pangenesis: A theory of heredity proposed by Charles Darwin in which gemmules containing hereditary information from every part of the body coalesce in the gonads and are incorporated into the reproductive cells.