| pregnancy, prolonged | Pregnancy continuing beyond the normal duration; in humans, usually beyond 294 days after the beginning of the last menses. (12 Dec 1998) |
|---|---|
| prolonged action tablet | sustained action tablet |
| variable deceleration | Transient foetal bradycardia usually denoting compression of the umbilical cord which may occur at any time in relation to a uterine contraction. (05 Mar 2000) |
| congenital severe combined immunodeficiency | Disease, one form of which is caused by the lack of a transcription factor required for expression of HLA class II genes. (18 Nov 1997) |
| severe combined immunodeficiency | Group of rare congenital disorders characterised by impairment of both humoral and cell-mediated immunity, leukopenia, and low or absent antibody levels. It is inherited as an x-linked or autosomal recessive defect. About half of the patients with autosomal recessive scid are deficient in the enzyme adenosine deaminase. (12 Dec 1998) |
| severe combined immunodeficient mice | Mice that lack both T and B lymphocytes and are used for transplantation and study of human lymphoid tissues resulting in a SCID-human mouse chimera. See: severe combined immunodeficiency. (05 Mar 2000) |
| severe postanoxic encephalopathy | Coma that develops a few days to 3 weeks after an acute hypoxic insult; the latter was usually severe enough to cause an initial bout of coma, which cleared, and was followed by a transient interval of apparent normality. Synonym: severe postanoxic encephalopathy. (05 Mar 2000) |
| deceleration | 1. The act of decelerating. 2. The rate of decrease in velocity per unit of time. (05 Mar 2000) |
| early deceleration | Slowing of the foetal heart rate early in the uterine contraction phase, denoting compression of the foetal head. (05 Mar 2000) |
| late deceleration | Any transient foetal bradycardia, the nadir of which occurs after the peak of the uterine contraction. (05 Mar 2000) |