Uterine isthmus

Inferior-posterior part of uterus

Not to be confused with Isthmus of uterine tube.

Uterine isthmus

Uterine isthmus labeled at 12

Details
Identifiers
Latin| isthmus uteri
Anatomical terminology

[edit on Wikidata]

The uterine isthmus is the inferior-posterior part of uterus, on its cervical end — here, the uterine muscle (myometrium) is narrower and thinner. It connects the body and cervix.[1]

The uterine isthmus can become more compressibile in pregnancy, which is a finding known as Hegar's sign.

## References

[edit]

1. ^ N. Jayne Klossner and Nancy T. Hatfield (2006). Introductory Maternity & Pediatric Nursing. Lippincott Williams & Wilkins. pp. 56. ISBN 9780781736909.

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Female reproductive system

Internal|

| Adnexa|

| Ovaries|

| Follicles|

* Corpus
* Hemorrhagicum
* Luteum
* Albicans
* Thecae
* Externa
* Interna
* Follicular antrum
* Follicular fluid
* Corona radiata
* Zona pellucida
* Membrana granulosa
* Perivitelline space

|

Other|

* Germinal epithelium
* Tunica albuginea
* Cortex
* Cumulus oophorus
* Stroma
* Medulla
* Retia ovarii

Oogenesis|

* Oogonium
* Oocytogenesis
* Oocyte
* Ootidogenesis
* Ootid
* Ovum

Fallopian tubes|

* Isthmi
* Ampullae
* Infundibula
* Fimbriae
* Ostia
* Intramural segments

Ligaments|

* Ovarian ligaments
* Suspensory ligaments
* Pampiniform plexus

Wolffian vestiges|

* Gartner's ducts
* Epoophora
* Vesicular appendages
* Paroophora

Uterus|

| Regions|

* Body
* Cavity
* Fundus
* Isthmus
* Cervix
* Canal
* Internal os
* External os
* Supravaginal portion
* Horns

|

Layers|

* Wall
* Endometrium
* Myometrium
* Perimetrium
* Parametrium
* Epithelium

Ligaments|

* Round ligaments
* Broad ligaments
* Cardinal ligaments
* Uterosacral ligaments
* Pubocervical ligaments

General|

* Glands
* Urogenital diaphragm

Vestibular glands|

* Bartholin's glands
* Skene's glands

Vagina|

* Canal
* Rugae
* Walls
* Fornices
* Support structures
* Epithelium

External|

| Vulva|

| Labia|

* Mons pubis
* Labia majora
* Pudendal cleft
* Labiocrural folds
* Anterior commissure
* Posterior commissure
* Dartos muliebris
* Posterior labial nerves
* Anterior labial nerves
* Perineal nerve
* Labia minora
* Frenulum
* Posterior labial arteries
* Posterior labial veins
* Interlabial sulci

|

Clitoris|

* Root
* Crura
* Bulbs
* Suspensory ligament
* Fundiform ligament
* Body
* Corpora cavernosa
* Trabeculae of corpora cavernosa
* Infra-corporeal residual spongy part
* Angle
* Commissure of bulbs
* Pars intermedia
* Glans
* Corona
* Frenulum
* Arteries
* Dorsal arteries
* Deep arteries
* Arteries of bulbs
* Internal pudendal artery
* Veins
* Superficial dorsal veins
* Deep dorsal veins
* Veins of bulbs
* Internal pudendal veins
* Nerves
* Dorsal nerves
* Pudendal nerve
* Clitoral hood
* Fascia
* Tunica albuginea
* Septum

Vestibule|

* Fossa
* Vaginal orifice
* Hymen
* Vestibular gland openings
* Urethra
* External urethral orifice

Blood supply|

* Arteries
* Ovarian arteries
* Uterine artery
* Arcuate artery
* Vaginal artery
* Spiral arteries
* Veins
* Ovarian veins
* Uterine vein
* Uterine venous plexuses
* Vaginal venous plexus

Other|

* G-spot
* Urethral sponge
* Perineal sponge
* Rectouterine pouch
* Vesicouterine pouch
* Uterotubal junctions

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