Impending Preterm Birth: Or something else? Differential Diagnosis

Certain conditions originating in the perinatal period (P00-P96).

Harm to the fetus or newborn caused by:
- Cervical insufficiency (weakness of the cervix).
- Premature rupture of membranes (PROM).
- Other and unspecified morphological and functional placental abnormalities (abnormalities of the placenta), including: Placental dysfunction (-malfunction), -infarction (tissue death due to hypoxia), -insufficiency (-weakness).

Pregnancy, childbirth and puerperium (O00-O99).

Cervical insufficiency as a complication of pregnancy.
Infection of the amniotic sac and membranes due to:
- Amnionitis (inflammation of the inner membranes of the egg).
- Chorioamnionitis (inflammation of the inner egg skin and the outer layer of the amniotic membranes around the embryo or fetus/unborn child).
- Placentitis (inflammation of the placenta).
Placenta praevia (malposition of the placenta) with hemorrhage:
- Marginalis (placental tissue reaches the internal cervix).
- Partialis (placental tissue partially overlaps the cervix).
- Totalis (placenta lies centrally over the inner cervix).
Prepartum (prenatal) hemorrhage in coagulopathy.
Prepartum hemorrhage (increased) associated with:
- Afibrinogenemia (complete absence of fibrinogen).
- Disseminated intravascular coagulation (DIC) – acquired life-threatening condition in which clotting factors are depleted by excessive blood clotting in the vasculature, resulting in a bleeding tendency
- Hyperfibrinolysis (increased fibrinolysis / fibrin cleavage, ie, endogenous dissolution of a blood clot (thrombus) by the enzyme plasmin).
- Hypofibrinogenemia (decreased fibrinolysis).
Other prepartum hemorrhage
Deep seating of the placenta with hemorrhage
Premature abruption of the placenta (abruptio placentae).

Symptoms and abnormal clinical and laboratory findings not elsewhere classified (R00-R99).

Genitourinary system (kidneys, urinary tract – sex organs) (N00-N99)