Menstrual Cycle - Histology
This page presents images from vaginal smears and uterine endometrium dilatation and curettage samples during different phases of the human menstrual cycle.
|Phase||Days (range)||Smear||Smear Description||Uterine Endometrium (D&C)|
|Menstrual||1 - 4||Click on image to see full size.||Both stratum corneum (red) and stratum spinosum (blue) epithelial cells will mostly blood.
Leukocytes and bacteria may also be present.
|Early Proliferative||5 - 9||Mainly large and small basophilic (blue) stratum spinosum cells.|
|Mid Proliferative||9 - 13||Stratum spinosum (blue) increase in size.
Dark precipate outside cells are bacteria.
|Late Proliferative, Ovulatory||13-14||mainly stratum corneum (red) which are large and flat.
Appear due to high estrogen levels.
|Secretory||15 - 22||stratum spinosum cells (blue) which are folded or with curled edges.
Appear immediately after ovulation due to increase in progesterone.
Leukocytes (small black cells) becoming more numerous.
|Late Secretory, (Ischemic) Premenstrual||23 - 28||stratum spinosum cells (blue) mainly with a few stratum corneum cells (red).
Clustering of cells occurs at this stage.
Both leukocytes and bacteria are prevelant.
See also Uterus Development
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Cite this page: Hill, M.A. (2021, September 28) Embryology Menstrual Cycle - Histology. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Menstrual_Cycle_-_Histology
- © Dr Mark Hill 2021, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G