Bleeding or spotting later in pregnancy may be a sign of a serious problem, like: 1  Preterm labor. This is labor that happens too early, before 37 weeks of pregnancy. 2  Placenta previa. This is when the placenta lies very low in the uterus and covers all or part of the cervix. 3  Placental abruption.
Afferent definition, bringing to or leading toward an organ or part, as a nerve or arteriole (opposed to efferent). See more.
afferent - a nerve that passes impulses from receptors toward or to the central nervous system. afferent nerve, sensory nerve. dorsal horn, dorsal root - one of the two roots of a spinal nerve that passes dorsally to the spinal cord and that consists of sensory fibers. afferent neuron, sensory neuron - a neuron conducting impulses inwards to the brain or spinal cord. nerve, nervus - any bundle of nerve fibers running to various organs and tissues of the body. afferent fiber, sensory fiber - a nerve fiber that carries impulses toward the central nervous system.