I-Fibronectin yosana olusesiswini (fFN)

Ukuzalwa ngaphambi kwexesha kubhekisa kwisifo esibonakaliswa kukuphazamiseka kokukhulelwa emva kweeveki ezingama-28 ukuya kwezingama-37 zokukhulelwa. Ukuzalwa ngaphambi kwexesha yeyona nto iphambili ebangela ukufa nokukhubazeka kwiintsana ezininzi ezingezizo ezemfuza ezizalwa ngaphambi kwexesha. Iimpawu zokuzalwa ngaphambi kwexesha ziquka ukushwabana kwesibeleko, utshintsho ekuphumeni kolwelo kwilungu lobufazi, ukopha kwegazi kwilungu lobufazi, iintlungu zomqolo, ukungonwabi esiswini, ukuxinana kwilungu lobufazi kunye nokuqaqamba.

Njenge-isoform ye-fibronectin, i-Fetal Fibronectin (fFN) yi-glycoprotein eyinkimbinkimbi enobunzima be-molecular obumalunga ne-500KD. Kwabasetyhini abakhulelweyo abaneempawu zokuzalwa ngaphambi kwexesha, ukuba i-fFN ≥ 50 ng/mL phakathi kosuku lwe-0 lweeveki ezingama-24 kunye neentsuku ezi-6 zeeveki ezingama-34, umngcipheko wokuzalwa ngaphambi kwexesha uyanda kwiintsuku ezi-7 okanye iintsuku ezili-14 (ukususela kumhla wovavanyo lweesampuli ezivela kwincindi yesibeleko). Kwabasetyhini abakhulelweyo abangenazo iimpawu zokuzalwa ngaphambi kwexesha, ukuba i-fFN iphakanyisiwe phakathi kosuku lwe-0 lweeveki ezingama-22 kunye neentsuku ezi-6 zeeveki ezingama-30, kuya kubakho umngcipheko okhulayo wokuzalwa ngaphambi kwexesha kwiintsuku ezi-6 zeeveki ezingama-34.