Obstetric Labor -- See Labor, Obstetric The repetitive uterine contraction during childbirth which is associated with the progressive dilation of the uterine cervix (CERVIX UTERI). Successful labor results in the expulsion of the FETUS and PLACENTA. Obstetric labor can be spontaneous or induced (LABOR, INDUCED).
Obstetric Nursing Vocational Guidance : Career as a certified nurse-midwife (CNM), certified midwife (CM), obstetric and neonatal nurse (RN) : ensuring safe and healthy pregnancies, deliveries and afterbirths.
Obstetrical Analgesia -- See Analgesia, Obstetrical The elimination of PAIN, without the loss of CONSCIOUSNESS, during OBSTETRIC LABOR; OBSTETRIC DELIVERY; or the POSTPARTUM PERIOD, usually through the administration of ANALGESICS.
Obstetrical Nursing -- See Obstetric Nursing A nursing specialty involving nursing care given to the pregnant patient before, after, or during childbirth.
Obstetrics -- See Also Obstetric Surgical Procedures Surgery performed on the pregnant woman for conditions associated with pregnancy, labor, or the puerperium. It does not include surgery of the newborn infant.
Obstetrics Trends : Preterm babies, fetal patients, and childbearing choices / John D. Lantos and Diane S. Lauderdale.
Obstruction Airway -- See Airway Obstruction Any hindrance to the passage of air into and out of the lungs.
Obstructions Airway -- See Airway Obstruction Any hindrance to the passage of air into and out of the lungs.
Occipital Region Trauma -- See Craniocerebral Trauma Traumatic injuries involving the cranium and intracranial structures (i.e., BRAIN; CRANIAL NERVES; MENINGES; and other structures). Injuries may be classified by whether or not the skull is penetrated (i.e., penetrating vs. nonpenetrating) or whether there is an associated hemorrhage.
Occluding Junctions -- See Tight Junctions Cell-cell junctions that seal adjacent epithelial cells together, preventing the passage of most dissolved molecules from one side of the epithelial sheet to the other. (Alberts et al., Molecular Biology of the Cell, 2nd ed, p22)
Occupational Diseases Diagnostic Imaging : International classification of HRCT for occupational and environmental respiratory diseases [electronic resource] / Y. Kusaka, K.G. Hering, J.E. Parker (eds.).