| decidual | Relating to the decidua. (05 Mar 2000) |
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| decidual cast | A mold of the interior of the uterus formed of the exfoliated mucous membrane in cases of extrauterine gestation. (05 Mar 2000) |
| decidual cell | An enlarged, ovoid connective tissue cell appearing in the endometrium of pregnancy. (05 Mar 2000) |
| decidual fissure | A cleft in the decidua basalis or placenta. (05 Mar 2000) |
| decidual reaction | The cellular and vascular changes occurring in the endometrium at the time of implantation. (05 Mar 2000) |
| double decidual sac | <radiology> DDS, visualization correlates with presence of pregnancy in 98%, may be seen at less than 5 weeks on transvaginal scans see: gestational sac (12 Dec 1998) |
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