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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.

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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Hints of Earth’s Early Appearance Hints of Earth’s Early Appearance
Language evolution Language evolution
Positioning the face cradle. A. Neck in proper alignment. B. Avoid hyperextension. C. Avoid too much ... Positioning the face cradle. A. Neck in proper alignment. B. Avoid hyperextension. C. Avoid too much ...
Early Pottery From Japan's Jomon Culture Early Pottery From Japan's Jomon Culture
Cretinism can result in a child born to a mother who was iodine deficient during early pregnancy Cretinism can result in a child born to a mother who was iodine deficient during early pregnancy
Days 24–25 Pharyngeal arches develop. They will contribute to the face, neck, larynx, and pharynx. Days 24–25 Pharyngeal arches develop. They will contribute to the face, neck, larynx, and pharynx.
Video: Glomerubular filtrate rate -pressures that affect GFR and net filtration pressure

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