| gestation | <obstetrics> The period of development of the young in viviparous animals, from the time of fertilization of the ovum until birth. Origin: L. Gestatio, from gestare = to bear (18 Nov 1997) |
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| gestation sac | The gestation sac is the fluid-filled sac in which the foetus develops, visible with an ultrasound exam. (09 Oct 1997) |
| multiple gestation | <radiology> Incidence: 1% of all births, twins in 1:85; triplets in 1:85x85; etc, uterus large for dates, may have elevated hCG, hPL, and aFP, at risk for IUGR: monochorionic-monoamniotic more than , monochorionic-diamniotic more than , dichorionic-diamniotic findings: 2 placentas indicate dichorionic-diamniotic, 1 placenta indicates monochorionic pregnancy or dichorionic pregnancy with fused placenta, separating membranes confirms diamniotic pregnancy (12 Dec 1998) |
| receptors, very late antigen | Members of the integrin family appearing late after T-cell activation. They are a family of proteins initially identified at the surface of stimulated T-cells, but now identified on a variety of cell types. At least six vla antigens have been identified as heterodimeric adhesion receptors consisting of a single common beta-subunit and different alpha-subunits. (12 Dec 1998) |
| late apical systolic murmur | A murmur previously considered benign, or even extracardiac, with a possible relationship to pericardial disease; it often represents mitral insufficiency, often localised and of moderate severity but with propensity for developing bacterial endocarditis, and is frequently associated with systolic click and mitral prolapse (Barlow syndrome; a balloon or billowing mitral valve leaflet) often producing a click, murmur, or both, as it prolapses during systole into the left atrium. (05 Mar 2000) |
| late benign syphilis | Late syphilis, manifested by serologic evidence of infection, but without any clinical manifestations. (05 Mar 2000) |
| late cyanosis | cyanose tardive |
| late deceleration | Any transient foetal bradycardia, the nadir of which occurs after the peak of the uterine contraction. (05 Mar 2000) |
| late diastole | That part of diastole immediately preceding systole. Synonym: late diastole. (05 Mar 2000) |
| late diastolic murmur | A murmur heard at the end of ventricular diastole (during atrial systole if in sinus rhythm), usually due to obstruction at one of the atrioventricular orifices. Synonym: atriosystolic murmur, late diastolic murmur. (05 Mar 2000) |
| late effect | Side effects of chemotherapy and/or radiotherapy which only become apparent with long-term monitoring of the patient over a period of years. These are of particular concern in patients below the age of puberty. (18 Nov 1997) |
| late gene | <genetics, molecular biology> Gene expressed relatively late after infection of a host cell by a virus, usually structural proteins for the viral coat. (18 Nov 1997) |
| late latent syphilis | Usually infectious in pregnant women only, who may pass the infection on to the foetus. (05 Mar 2000) |
| late luteal phase dysphoric disorder | <syndrome> A combination of emotional, physical, psychological, and mood disturbances that occur after ovulation and normally end with the onset of the menstrual flow. (12 Dec 1998) |
| late-phase response | Recurrence of symptoms after an appreciable interval following challenge with an antigen; preceded by an initial early-phase response. (05 Mar 2000) |