<Tr> <Th> MeSH </Th> <Td> D002581 </Td> </Tr> <Tr> <Td_colspan="2"> (edit on Wikidata) </Td> </Tr> <P> Cervical weakness, also called cervical incompetence or cervical insufficiency, is a medical condition of pregnancy in which the cervix begins to dilate (widen) and efface (thin) before the pregnancy has reached term . Definitions of cervical weakness vary, but one that is frequently used is the inability of the uterine cervix to retain a pregnancy in the absence of the signs and symptoms of clinical contractions, or labor, or both in the second trimester . Cervical weakness may cause miscarriage or preterm birth during the second and third trimesters . Another sign of cervical weakness is funneling at the internal orifice of the uterus, which is a dilation of the cervical canal at this location . </P> <P> In cases of cervical weakness, dilation and effacement of the cervix may occur without pain or uterine contractions . In a normal pregnancy, dilation and effacement occurs in response to uterine contractions . Cervical weakness becomes a problem when the cervix is pushed to open by the growing pressure in the uterus as pregnancy progresses . If the responses are not halted, rupture of the membranes and birth of a premature baby can result . </P>

Icd 10 code for cervical funneling in pregnancy