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 :'''One of the following 7th characters is to be assigned to each code under subcategory O60.2. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from subcategory O60.2 that has a 7th character of 1 through 9.'''
 * 0 not applicable or unspecified
 * 1 fetus 1
 * 2 fetus 2
 * 3 fetus 3
 * 4 fetus 4
 * 5 fetus 5
 * 9 other fetus
 * O60.2 Term delivery with preterm labor
 * O60.20 Term delivery with preterm labor, unspecified trimester
 * O60.22 Term delivery with preterm labor, second trimester
 * O60.23 Term delivery with preterm labor, third trimester

O61 Failed induction of labor

 * O61.0 Failed medical induction of labor
 * Failed induction (of labor) by oxytocin
 * Failed induction (of labor) by prostaglandins
 * O61.1 Failed instrumental induction of labor
 * Failed mechanical induction (of labor)
 * Failed surgical induction (of labor)
 * O61.8 Other failed induction of labor
 * O61.9 Failed induction of labor, unspecified

O62 Abnormalities of forces of labor

 * O62.0 Primary inadequate contractions
 * Failure of cervical dilatation
 * Primary hypotonic uterine dysfunction
 * Uterine inertia during latent phase of labor
 * O62.1 Secondary uterine inertia
 * Arrested active phase of labor
 * Secondary hypotonic uterine dysfunction
 * O62.2 Other uterine inertia
 * Atony of uterus without hemorrhage
 * Atony of uterus NOS
 * Desultory labor
 * Hypotonic uterine dysfunction NOS
 * Irregular labor
 * Poor contractions
 * Slow slope active phase of labor
 * Uterine inertia NOS
 * Excludes1: atony of uterus with hemorrhage (postpartum) (O72.1)