Each PREGNANCY EPISODE

K	must be related to one and only one PATIENT
	may be for antenatal care the responsibility of one and only one GENERAL MEDICAL PRACTITIONER
	may be for antenatal care the responsibility of GMP at one and only one GENERAL MEDICAL PRACTITIONER PRACTICE
	may be related to one or more HOSPITAL PROVIDER SPELL
	may be related to one or more LABOUR AND DELIVERY
	may be related to one or more MATERNITY DOMICILIARY VISIT
	may be associated with one or more MATERNITY MEDICAL SERVICE
	may be related to one or more MIDWIFE EPISODE