Ultrasounds are a diagnostic tool typically used to visually assess the soft tissues, i.e. the organs, blood vessels, and glands, of a patient. They are recommended if a patient is displaying signs or symptoms that could be diagnosed by looking at the soft tissues that may be relevant in the possible conditions associated with the displayed symptoms. Some possible symptoms that may warrant the use of an ultrasound include swelling, pain, or other sensations within the body that require a view of the organs for diagnosis. An ultrasound may be recommended by a doctor if the possible cause of conditions would be best diagnosed using a non-invasive method that is pain and risk-free. A doctor can use ultrasounds to diagnose a variety of conditions visible in the soft tissues such as abnormalities in the heart, intestines, blood vessels, or internal bleeding. Ultrasounds are the safest diagnostic tool making them most often the best option for use in pregnancies as they are incredibly unlikely to harm the fetus.