AnatomyoftheFemaleReproductiveSystemOb&GyDepartment,Firsthospital,Xi'anJiao Tong UniversityWANG SHU2025/10/21
2025/10/21 1 Anatomy of the Female Reproductive System Ob & Gy Department, First hospital, Xi’an Jiao Tong University WANG SHU
Anatomy of the Bony PelvisBonesJointsFalsepelvisand true pelvisThree planes of the true pelvisTypesof thefemalepelvis2025/10/21
2025/10/21 2 Anatomy of the Bony Pelvis • Bones • Joints • False pelvis and true pelvis • Three planes of the true pelvis • Types of the female pelvis
SacroliacjointIliumSacro-OcoccygealSacrum6CoccyxOjointPubisSymphysisIschiumpubisboneF&Tjoints3plane
bone joints F & T 3 plane
I.BONESiliumTwo coxaeIschiumPelvispubisSacrum5fusedvertebraeCoccyx5fused cartilaginous bones2025/10/21
2025/10/21 4 I. BONES Pelvis Two coxae ilium Ischium pubis Sacrum 5 fused vertebrae Coccyx 5 fused cartilaginous bones
.JOINTSTwo sacro-iliac jointsjointsSacro-coccygeal jointSymphysis pubis2025/10/21
2025/10/21 5 II. JOINTS joints Two sacro-iliac joints Sacro-coccygeal joint Symphysis pubis
Ill.FalsePelvis &TruePelvisThelinesofdemarcationbetweenfalsepelvisandtruepelvisborderline.posterior:upper border of sacral promontory.lateral:ilio-pectineal boundary.anterior:upper borderof pubisFalsepelvis:Truepelvis2025/10/21
2025/10/21 6 III. False Pelvis & True Pelvis • The lines of demarcation between false pelvis and true pelvis - border line . posterior : upper border of sacral promontory . lateral: ilio-pectineal boundary . anterior: upper border of pubis • False pelvis • True pelvis
IV.Three Planesof True Pelvis· Inlet: the pelvic inlet to the pelvis minor is bounded by.posteriorly:the promontory of the sacrum;.laterally:the linea terminal;.anteriorly:the upperborder of the pubis,ending at thesymphysis.Mid-cavityOutlet:veryirregular,itisboundedby.anteriorly:the arcuate ligament of thepubis,.laterally:the ischiopubic arch,theischial tuberosity,.Posteriorly:thesacrotuberous ligament,the coccyx.2025/10/21
2025/10/21 7 IV. Three Planes of True Pelvis • Inlet: the pelvic inlet to the pelvis minor is bounded by . posteriorly: the promontory of the sacrum; . laterally:the linea terminal; . anteriorly:the upper border of the pubis, ending at the symphysis. • Mid-cavity • Outlet: very irregular ,it is bounded by . anteriorly: the arcuate ligament of the pubis , . laterally: the ischiopubic arch, the ischial tuberosity, . Posteriorly: the sacrotuberous ligament, the coccyx
V.Types of the Female Pelvis·GynaecoidAnthrocoid·Platypelloid·Android2025/10/21
2025/10/21 8 V. Types of the Female Pelvis • Gynaecoid • Anthrocoid • Platypelloid • Android
bGynaecoidAnthropoidadPlatypelloidAndroidFour basic types of bony pelvis
a b c d
A.Gynecoid PelvicInlet:The gynecoid pelvis provides a rounded,slightly oviod,orellipticalinlet with awell-rounded forepelvisPosteriorsegment:This type ofpelvishas a well-rounded, spacious posteriorsegment,anadequate sacrosciatic notch,ahollow sacrumwith a somewhat backward sacralinclination,and a Norman-typearchofthepubicrami.Side walls:This type of pelvis has straight sidewalls and wideinterspinousandintertuberousdiameters.the bonesareprimarily of mediumweight and structure12025/10/2110
2025/10/21 10 A. Gynecoid Pelvic Inlet: The gynecoid pelvis provides a rounded ,slightly oviod , or elliptical inlet with a well-rounded forepelvis. Posterior segment: This type of pelvis has a well-rounded, spacious posterior segment, an adequate sacrosciatic notch, a hollow sacrum with a somewhat backward sacral inclination,and a Normantype arch of the pubic rami. Side walls: This type of pelvis has straight side walls and wide interspinous and intertuberous diameters.the bones are primarily of medium weight and structure