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The effective use of contraception has contributed both to the falling birthrate and the falling rate of abortion.
Melatonin
A hormone produced by the pineal gland that regulates sleep and wakefulness.
Melatonin
A substance secreted by the pineal gland that controls the patterns of sleeping and waking.
Dopamine
A neurotransmitter associated with pleasure, movement, and attention in the brain.
Cortisol
Cortisol is a steroid hormone released by the adrenal glands in response to stress and has multiple functions including regulating metabolism and immune response.
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