Libeke tse mashome a mabeli a metso e supileng tsa bokhachane ke nako ea phetoho lipakeng tsa bobeli le bobeli ba boraro ba bokhachane. Nakong ena litho tsohle le lisebelisoa tsa lesea li se li ntse li sebetsa ka mafolofolo 'me li tsoela pele ho hōla ho fihlela likhoeli tse 9.
Hona joale, lesea le se le ntse le le khoeli ea bosupa ea nts'etsopele 'me e phetse hantle. Mathata a mabeli a nako ena a futsanehile (thermomolulation (lesea ha le e-s'o khone ho boloka mocheso oa mmele haeba ho hlaha ka nako ena). Matšoafo, ke feela mokhoa oa surfactant (ntho e koahelang matšoafo ka hare le ho a jala) e qala-ke hore, matšoafo a lesea a kokobela ka ho phefumoloha, e tletse ka ho emisoa ha eona ntle le thepa ea bongaka e lekaneng.
Libeke tse 27, lesea le sa tsoa emoloa, le se le bitsoa fetus ka nako ena, le ntse le falla ka mafolofolo, le phefumoloha, ho sa tsotellehe hore matšoafo a lona a tletse amniotic fluid mme ha a kenye letsoho phapanyetsong ea khase. Sena se hlokahala bakeng sa ntshetsopele ea mesifa ea ho hema ea lesea. Ngoana o se a butse mahlo, a phatsima ka matla, a etsa hore a sisinyehe ka molomo, ka linako tse ling a bile a hula monoana.
Qalong ea halofo ea boraro, bakhachane ba qala ho ba boima, empa sena ke letšoao la tsela e nepahetseng ea bokhachane. Nakong ena, lintho tse hlokahalang bakeng sa ntshetsopele ea lesea likhoeli tse peli tse latelang le nako ea postpartum li bolokiloe. Hangata boima bo fumanoang nakong ea bokhachane bo nyamela ka morao ho tsoaloa.
Libeke tse 27 tsa bokhachane - boima ba fetal
Libeke tse 27, boima ba lesea le ka tlase ho 1-1.5 lik'hilograma, ho itšetlehile ka molao-motheo oa batsoali. Ka nako e ts'oanang, lesea le e-s'o be le tšesaane le le lekaneng, kaha bongata ba li-fetus ke boimana ba likhoeli tse 8-9, i.e. libeke tse 13 tse latelang. Hape, lesea le hōla ka bolelele - ka motsotsoana bolelele ba eona e ka ba cm 30-35, 'me ka nako ea tsoalo e tla eketseha ho fihlela ho 50-55 cm.