| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Maternal perinatal period | Is a | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier |  | 
| Obstetrical pulmonary fat embolism | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Obstetric pulmonary embolism | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 1 | 
| Obstetric air pulmonary embolism - delivered | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Obstetric air pulmonary embolism with antenatal complication | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Obstetric air pulmonary embolism | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Fat embolism - obstetric | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Pulmonary embolism in childbirth | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 1 | 
| Pregnancy | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Pregnant - vaginal examination confirms | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Infection of amniotic cavity | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Miscarriage with laceration of periurethral tissue | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 6 | 
| Miscarriage with perforation of periurethral tissue | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 5 | 
| Escherichia coli intra-amniotic fetal infection | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Pregnant - on abdominal palpation | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Pregnancy, childbirth and puerperium finding | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 1 | 
| Postpartum state, 4 weeks | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 1 | 
| Braun von Fernwald's sign | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Miscarriage complicated by renal failure | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Miscarriage with renal tubular necrosis | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Abnormal pregnancy | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Miscarriage with uremia | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Quickening of fetus | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 4 | 
| Placenta increta | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Transverse OR oblique presentation of fetus | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Danforth's sign | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Miscarriage with cerebral anoxia | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 6 | 
| Prolonged rupture of membranes | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| High maternal weight gain | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Fetal distress affecting management of mother | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 4 | 
| Failed attempted abortion with septic shock | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 4 | 
| Postpartum period, 4 days | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 1 | 
| Miscarriage complicated by metabolic disorder | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Twin-to-twin blood transfer | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 4 | 
| Gestation period, 34 weeks | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Gestation period, 38 weeks | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Premature birth of newborn twins | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 1 | 
| Fetal acidemia affecting management of mother | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Para 5 | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Failed attempted abortion complicated by embolism | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Fetal death, affecting management of mother | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Chaussier's sign | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Excessive vomiting in pregnancy | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 4 | 
| Para 1 | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Precocious pregnancy | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Term birth of identical twins, both stillborn | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 1 | 
| Rigid cervix uteri affecting pregnancy | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Placenta membranacea | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Four previous induced terminations of pregnancy | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Parturient hemorrhage associated with hypofibrinogenemia | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 4 | 
| Previous surgery to vagina affecting pregnancy | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 4 | 
| Failed attempted abortion with cerebral anoxia | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 5 | 
| Failed attempted abortion with renal tubular necrosis | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Prolonged second stage of labor | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Velamentous insertion of umbilical cord | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 4 | 
| Placental infarct affecting management of mother | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Gestational edema without hypertension | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Obstruction by bony pelvis | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Stillbirth of premature male (1000-2499 gms.) | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 1 | 
| Failed medical induction of labor | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Gestation period, 33 weeks | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Mature abnormal placenta | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Desultory labor | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Mentum presentation of fetus | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Cervical pregnancy | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Retraction ring dystocia | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Vasa previa | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Maternal dystocia | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Gestation period, 12 weeks | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Malpresentation of fetus | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Twin pregnancy | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Postpartum state, 6 weeks | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 1 | 
| Placenta of multiple birth higher than twin | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Impetigo herpetiformis | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 5 | 
| Gestation period, 17 weeks | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Intrauterine pregnancy | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Miscarriage with fat embolism | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 4 | 
| Obstruction by abnormal pelvic soft tissues | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Failed attempted abortion with urinary tract infection | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Cervical dilatation, 6cm | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Isoimmunization from non-ABO, non-Rh blood-group incompatibility affecting pregnancy | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Failed attempted abortion complicated by shock | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Miscarriage with sepsis | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 6 | 
| Malpresentation other than breech, successfully converted to cephalic presentation | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Annular placenta | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Stillbirth of immature female (500-999 gms.) | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 1 | 
| Abortion on demand | Occurrence | True | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Kanter's sign | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Interlocked twins | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 1 | 
| Cervical cerclage suture present | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Normal breast feeding | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Persistent occipitoposterior position | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Stillbirth of mature female (2500 gms. or more) | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 1 | 
| Placenta accreta | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Piskacek's sign | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Hegar's sign | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Calkin's sign | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 | 
| Fetal-maternal hemorrhage | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 4 | 
| Inversion of uterine contraction | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Gestation period, 30 weeks | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 2 | 
| Amnion nodosum | Occurrence | False | Maternal pregnancy period | Inferred relationship | Existential restriction modifier | 3 |