endometrium

n. the layer of cells lining the uterus. It varies in thickness during the menstrual cycle, reaching a peak of cellular proliferation approximately 1 week after ovulation, in preparation for implantation of a fertilized ovum, and sloughing off as menstrual flow 2 weeks after ovulation if the ovum is not fertilized. —endometrial adj.

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Psychology term of the day

July 27th 2024

primary insomnia

in DSM–IV–TR, a sleep disorder characterized by difficulty in initiating or maintaining a restorative sleep to a degree in which the severity and persistence of the sleep disturbance causes clinically significant distress, impairment in a significant area of functioning, or both. The disorder is not caused by a general medical condition or the effects of a substance and is not exclusively an aspect of another sleep disorder or mental disorder. It is termed insomnia disorder in DSM–5. See dyssomnia. Compare primary hypersomnia.