Update firstDayOfTheLastMenstrualPeriod.jsonld

Author: lzehl

instances/latest/terminologies/ageReference/firstDayOfTheLastMenstrualPeriod.jsonld

@@ -4,7 +4,7 @@
   },
   "@id": "https://openminds.om-i.org/instances/ageReference/firstDayOfTheLastMenstrualPeriod",
   "@type": "https://openminds.om-i.org/types/AgeReference",
-  "definition": "Age reference point characterized by the fusion of male and female gametes resulting in the formation of a zygote.",
+  "definition": "Age reference point characterized by the onset of the most recent menstrual bleeding cycle prior to conception, used clinically as a proxy reference for estimating gestational age.",
   "description": null,
   "interlexIdentifier": null,
   "knowledgeSpaceLink": null,