Bishop score

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This is a method of expressing the factors relating to the ease of induction or how readily the patient will go into labour after induction.

The modified Bishop scoring system (Calder score) is presented below:

Bishop EH. Pelvic scoring for elective induction. Obstet Gynecol, 2, 1964, 24, 266-268

Calder AA, Embrey MP, and Hillier K. Exta-amniotic prostaglandin E2 for the induction of labour at term. Journal of Obstetrics & Gynaecology of the British Commonwealth., 1, 1974, 81, 39-46.

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		Pelvic Score
Cervical feature	0	1	2	3
Dilation of	0cm	1-2cm	3-4cm	5-6cm
Effacement (%)	0-30	40-60	60-70	80+
Station of presenting part (relative to the ischial spines)	-3cm	-2cm	-1/0cm	+1/+2cm
Consistency of	firm	medium	soft	-
Position of cervix	posterior	mid -position	anterior	-

		Pelvic Score
Cervical feature	0	1	2	3
Dilation of	<1cm	1-2cm	2-4cm	>4cm
Length of	4cm	2-4cm	1-2cm	<1cm
Station of presenting part (relative to the ischial spines)	-3cm	-2cm	-1/0cm	+1/+2cm
Consistency of	firm	average	soft	-
Position of cervix	posterior	mid;anterior	-	-

Bishop score

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