Normal labour intro
- 2. Learning Objectives 1) Definition of normal labour. 2) Assesment criteria for the same. 3) Causes of labour initiation. 4) Stages of labour 5) Key words in labour mechanism 2
- 3. NORMAL LABOUR Defn – A series of events that takes place in the genital organs in order to expel the viable products of conception out of the womb through the vagina into the outer world. 3
- 4. NORMAL LABOUR Criteria by WHO Spontaneous in onset & at term Vx presentation Without undue prolongation Natural termination with minimal aids Without any complications 4
- 5. CAUSES Uterine distension Feto placental cascade Oestrogen Progesterone PG’s Oxytocin 5
- 6. STAGES OF LABOUR 1st :onset of true labour pain to full cervical dilatation. 2nd : full cervical dilatation to fetal expulsion 3rd :placental expulsion 4th :observation 6
- 7. DURATION OF LABOUR 1ST STAGE 2ND STAGE 3RD STAGE PRIMI 12 HRS 2 HRS 15 MIN MULTI 6 HRS 30 MIN 15 MIN 7
- 8. MECHANISM OF LABOUR Engagement ↓ Increasing flexion ↓ Int. rotation of occiput ↓ Crowning ↓ Delivery of head by extension ↓ Restitution ↓ External rotation ↓ Delivery of shoulders & trunk by lateral flexion 8
- 11. Key Factors Power Passage Passenger 11
- 12. CLINICAL COURSE OF LABOUR 1. Pains 2. Dilatation & effacement of cervix 3. Status of the membranes 4. Descent of foetus 5. Vaginal signs 6. Maternal signs & foetal effects 12
- 13. Summary What is normal labour? Responsible factors for normancy Causes of labour Stages of labour Outline of labour mechanism 13
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