| Namespace | MPheno.ontology | Obsolete | false |
| description | any structural anomaly of the corkscrew-like arteries in premenstrual or progestational endometrium; uterine spiral arteries play a vital role in supplying nutrients to the placenta and fetus, and are thus remodeled into highly dilated inelastic vessels by the action of invading trophoblast (physiological change) |
