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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.