Fibronectin na tayi (fFN)

Haihuwa kafin lokacin haihuwa na nufin wata cuta da ke nuna katsewar ciki bayan makonni 28 zuwa 37 na ciki. Haihuwa kafin lokacin haihuwa ita ce babbar sanadin mutuwa da nakasa a yawancin jarirai da ba a gado ba bayan haihuwa. Alamomin haihuwar kafin lokacin sun haɗa da matsewar mahaifa, canje-canje a cikin fitar da ruwan farji, zubar jini a farji, ciwon baya, rashin jin daɗi a ciki, jin matsewa a ƙashin ƙugu da kuma ciwon mara.

A matsayin isoform na fibronectin, Fetal Fibronectin (fFN) wani hadadden glycoprotein ne mai nauyin kwayoyin halitta kusan 500KD. Ga mata masu juna biyu da ke da alamun haihuwa kafin lokacin haihuwa, idan fFN ya kai ≥ 50 ng/mL tsakanin kwana 0 na makonni 24 da kwana 6 na makonni 34, haɗarin haihuwar kafin lokacin haihuwa yana ƙaruwa cikin kwanaki 7 ko kwanaki 14 (daga ranar gwajin samfurin daga fitar farji daga mahaifa). Ga mata masu juna biyu ba tare da alamun haihuwar kafin lokacin haihuwa ba, idan fFN ya karu tsakanin kwana 0 na makonni 22 da kwana 6 na makonni 30, za a sami ƙaruwar haɗarin haihuwa kafin lokacin haihuwa cikin kwanaki 6 na makonni 34.