Nhengo inonyanya kukosha yemwana asati aberekwa panguva yose yehutumbi ndiro placenta. Iyi nhengo inoberekerwa mubereki mushure mekuberekwa. Uye kakapedza hafu yeawa mushure mokuberekwa, placenta inobva mubereki.
Ikopa, kana munzvimbo yevanhu vese, inosimudzira fetus ne oxygen, zvinovaka muviri, inoratidzira kusagadzikana kwezvinhu, uye inoitawo chekudzivirirwa, kuchengetedza mucheche kubva kune zvirwere zvakasiyana-siyana uye chepfu zvinogona kuwanikwa kubva kuna amai kuenda kumubereki.
Inzvimbo inofamba nenzira yezvidzidzo, kukura uye kukwegura. Pakutanga danho repentcenta rinonzi chorion, uye ikozvino mumwedzi wechipiri inoumbwa mu placenta. Pose, zviyero zvina zvekukura kwepentecenta zvinoratidzwa nevhiki : 0, I, II, uye III.
Ndicho chikonzero pazvinhu zvose zvakarongeka zvechidimbu che fetus chiremba akanyatsodzidza pa placenta uye anogadza dhigiriro rayo. Shure kwezvose, kudya kwechechecheche, kukura kwayo uye hutano hwayo zvinovimba nayo.
Kukura kwepascenta 0
Kazhinji, chiyero chekukura kwepentecenta zero kusvikira vhiki makumi matatu. Iyi mamiriro epa placenta inoratidza kuti nhengo ino inokosha yemucheche inonyatsoita mabasa ayo ose uye inokwanisa kuichengetedza zvakanyanya.
Pakati pekukura kwepascenta 0 iyi nhengo ine chimiro chakafanana uye iri pachikwata chekutanga chekugadzirwa kwayo.
Zvisinei, zvose kukwegura kusati kwasvika kwepentecenta uye kunonoka mukukura kwechikamu ichi chinokosha kwakaipa. Shure kwezvose, nekukura kwe fetus, iyo placenta inokurawo, uye kana ikasachinja kusvikira vhiki yegumi nemasere, vanachiremba vanorwara zvakadai se "kukurumidza kufunganidzwa kwepentecenta". Nenzira inofadza, ichi chiitiko chisingawanzoitiki. Vakadzi vanotambura nechirwere cheshuga mellitus kana kuti vane Rh yakasiyana neye fetus ndeyemungozi, uye izvi zvinoitika mumutsetse zvinogona kuratidza kuvepo kwekusavapo kwekusavhiringidza mukukudziridza mwana.
Asi chinhu chikuru kuna amai panguva yekuzvitakura hachisi chokugunun'una, vanachiremba vanokwanisawo kuita zvikanganiso uye kuisa kusarudzwa kusina kunaka. Ita kuti pamuviri wako uye kuberekwa kusakuvhiringidza.