Menstrual Cycle - Histology
During the menstrual cycle, the uterus undergoes a series of histologically recognisable cyclic changes under the influence of changing circulating hormonal levels.
This page presents clinical histology images from vaginal smears and uterine endometrium dilatation and curettage samples during different phases of the human menstrual cycle.
Beneath these clinical images are a number of more detailed uterus histology images.
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History of the Pap Smear
(Papanicolaou smear, pap test, cervical smear) The text below is from the ABC - Great Moments In Science.
- "Luckily, we have the famous Pap Smear - an excellent way to find cancer of the cervix before it digs in locally and/or spreads throughout the body. The Pap Smear is named after a certain Dr. Papanicolaou - who did a Pap Smear on his wife virtually every day for 20 years.
- George Nikolas Papanicolaou was born in 1883 in Kymi, a small town overlooking the Aegean Sea on the Island of Euboea in Greece. His father, Nikolas Papanicolaou was both the Major of Kymi and a medical doctor. His older brother, Naso, had studied law, so his father convinced George to continue in the family medical tradition. So George studied medicine, and did well, graduating with a degree in honours in 1904............"
This histology technique was originally described in a publication by George Nikolas Papanicolaou in 1942. There are 5 different stains used in the technique and it has been used for many different human bodily fluids (CSF, semen, aspirations). The original protocol has also been modified several ways (Bismarck brown Y deleted).
Dilation and Curettage
Medical procedure where uterine endometrium is collected by Dilation and Curettage (D&C or DnC). This medical procedure is used to diagnose or treat uterine abnormalities or in association with a miscarriage.
See also Uterus Development
- Uterus Histology Links: Labeled - proliferative phase | Labeled - gland proliferative phase | Labeled - secretory phase | Unlabeled - secretory phase | Unlabeled - late secretory phase | Labeled - gland secretory phase | Menstrual Cycle | Uterus Development
- The normal vaginal flora (lactobacillus morphotypes) is replaced by a mixed microbial flora consisting of Gardnerella vaginalis, Mycoplasma hominis and anaerobes.
- Originally described by Gardner and Dukes (1955).
- clinical features - malodorous, thin homogeneous vaginal discharge with elevated vaginal pH above 4.5.
- Nugent's criteria - microbiological diagnosis of bacterial vaginosis, by counting bacterial cell types on Gram stained slides of vaginal smears.
Proposed Gram stain based categorisation
- grade I - when only Lactobacillus cell types (large Gram positive rods) were present.
- grade II (intermediate) when both Lactobacillus and Gardnerella or Bacteroides-Prevotella cell types were present.
- grade III (bacterial vaginosis) when Lactobacillus cell types were absent and only Gardnerella, Bacteroides-Prevotella or Mobiluncus cell types were present.
- grade IV when Gram positive cocci were predominantly present.
- Smear Image Links: L. crispatus | L. crispatus | non-L. crispatus with thin lactobacilli | non-L. crispatus with thin lactobacilli | mixture non-L. crispatus with L. crispatus | mixture non-L. crispatus with L. crispatus | irregular-shaped Gram positive rod | irregular-shaped Gram positive rod | mixture Lactobacillus and bacterial vaginosis-associated | mixture Lactobacillus and bacterial vaginosis-associated | bacterial vaginosis | bacterial vaginosis
- Links: Menstrual Cycle - Histology | Histology - Gram Stain | Bacterial Vaginosis | CDC (USA) Fact Sheet - Bacterial Vaginosis
- ↑ G N Papanicolaou A NEW PROCEDURE FOR STAINING VAGINAL SMEARS. Science: 1942, 95(2469);438-9 PMID:17842594 | Science
- ↑ H L GARDNER, C D DUKES Haemophilus vaginalis vaginitis: a newly defined specific infection previously classified non-specific vaginitis. Am. J. Obstet. Gynecol.: 1955, 69(5);962-76 PMID:14361525
- ↑ R P Nugent, M A Krohn, S L Hillier Reliability of diagnosing bacterial vaginosis is improved by a standardized method of gram stain interpretation. J. Clin. Microbiol.: 1991, 29(2);297-301 PMID:1706728 | PMC269757
- ↑ Rita Verhelst, Hans Verstraelen, Geert Claeys, Gerda Verschraegen, Leen Van Simaey, Catharine De Ganck, Ellen De Backer, Marleen Temmerman, Mario Vaneechoutte Comparison between Gram stain and culture for the characterization of vaginal microflora: definition of a distinct grade that resembles grade I microflora and revised categorization of grade I microflora. BMC Microbiol.: 2005, 5();61 PMID:16225680 | PMC1266370 | BMC Microbiol.
External Links Notice - The dynamic nature of the internet may mean that some of these listed links may no longer function. If the link no longer works search the web with the link text or name.
- Sociedad Argentina de Citología Papanicolaou staining protocol
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Cite this page: Hill, M.A. (2013) Menstrual Cycle - Histology. Retrieved December 21, 2013, from http://embryology.med.unsw.edu.au/embryology/index.php?title=Menstrual_Cycle_-_Histology
- Dr Mark Hill 2013, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G