FACTOR AFFECTING LABOUR

 Successful labour & delivery depends on:-

(1) Pelvic dimensions:-

Adequate pelvic inlet (Anterior- posterior diameter normal)

Adequate Mid pelvis (Ischial spine do not bony canal)

Adequate out let (Adequate distance b/w tuberosities)

(2) Fetal dimensions:-

(a) Fetal size:- Excessive size, fetal skull bones may not be able to override enough to be accommodated in the bony pelvic cavity.

(b) Fetal Posture:- Fetal assume a characteristic posture

Fetal Hard flexed

Back is sounded

Extremities are flexed

Fixed hard allow smallest diameter of fetal hard

(c) Fetal line:- Metallic means relationship of the fetal long aids to the long axis the uterus – Transverse lie

Obliquely

(d) Fetal Attitude:- It means the relationship of the fetal head & limbs to its trunks- Well flexed attitude

   Deflexed attitude

            Extended

(e) Fetal presentation:- It refers to the parts of the fetus that lies in the pelvic in the lower of the uterus.

Presentation can be cephalic (Occipital, Sinciput, brow, face)

Breech/Podalic (Frank or forting)

Shoulder/compound (hard/arm)

(f) Fetal Presenting past:- It refers to the part of the presentation which overlies the internal os.

Example – In cephalic presentation the presenting part can occipital, sinciput, brow, face or mouton (chin)

(g) Denominator:- It means a bony fixed point on the presenting part

Example- In vertex presentation the denominator is occiput mentum in face, frontal eminence in brow sacrum in breech & acromisn in shoulder.

(h) Fetal Position:- The position is the relationship b/w the denominator of the presenting part & land mark of female pelvis

Ex. Fetus presenting by the cervix with output on the left anterior part of the women’s pelvic would have presentation & position describe as LOT or LOA