Vhiki yechitanhatu yekuzvitakura yasvika. Kubva panguva ino muvakadzi vazhinji vanotanga kutanga toxicosis: kusuruvara nekurutsira mangwanani, kushandura kuravira, chido chekudya chimwe chinhu chakadirwa. Zuva remucheche pamasvondo masere ekuberekwa kwemavhiki mana chete (sekushambadzira kunoitika masvondo maviri mushure mekutanga kwenguva inopera). Amai vangangwana vangave vanoda kuziva kuti imbui inenge inenge mavhiki matanhatu, iyo inotaridzika uye inokura sei.
Embryo kukura kwevhiki 6
Kana iwe uchiyeuka, vhiki yapfuura mwana wacho akaita sehombe yepurasitiki. Pakupera kwevhiki rechitanhatu, neural tube ye embryo yakasimbiswa. Iyi ndiyo imwe yenhau dzinokosha zvikuru dzekudzivirira: kana kugadzirisa kwakakwana kusingaitiki, mwana anogona kuberekwa ane hutsinye hwakanyanya hunobudirira. Masayendisiti akakwanisa kugadzirisa kuti folic acid ine simba guru pamushandisirwo weveural tube formation. Ndicho chikonzero chiremba-gynecologists munyika yose inorayira kudya kunogamuchirwa kwe folic acid nokuda kwekuzvitakura uye kuronga kuzvitakura kwevakadzi - kuyerwa kunokosha chete kuchengeta zvakanaka.
Mushure mekuvhara mhedziso yomusoro we-neural tube, kuumbwa kwouropi uye rwonzi rwomukona runotanga. VaSomites, vakaumbwa vhiki rapera, zvishoma nezvishoma vanotanga kushanduka kwavo kuva mucherechedzo wemakona uye nenyundo. Inotarisa yekutanga, kunyange zvakadaro, mapfupa. Pavhiki yechitanhatu yehutumbi, embryo inowana rudiments yemakumbo nemakumbo. Iye zvino mitezo yeramangwana inoratidzika seyiduku duku, uye zvigadziri zvinooneka zvishoma pamberi pemakumbo uye kuumba nokukurumidza.
Pamukati mavhiki masere mavhiki matanhatu kusvika maawa matanhatu, ikozvino inotema zviduku, kwete zvakare nedova, mwoyo. Kunyange zvazvo yakasviba uye inomiririra tube yakakomberedzwa, inenge ichiri kuputika, ichidzikisa ropa rechecheche pakuisa placenta. Iyo fetal heartbeat pavhiki 6 inogona kuve yakanyoreswa nemubatsiro wezuva ranhasi ultrasensitive ultrasound sensor.
Mukuwedzera, mazai emavhiki matanhatu anotanga kuumba hutumbu, pane zvidimbu zvezvikamu zvinokosha (mapapu, chiropa, utachiona uye mapascasi). Pamakona emusoro unoitwa nhengo dzenhengo: nzeve dzekunzwa uye maziso anoonekwa - nzeve dzeramangwana nemaziso. Kunyange zvazvo munhu akadaro asiripo, pane zvinyorwa zvemuromo nemhino. Tambo dzemakumbo, nzeve yomukati, retina uye lens yeziso dzinoumbwa.
Iko mushure memasvondo matanhatu kusvika kune makumi manomwe hausi yebhiriberry kana rice briji: kureba kwayo kubva korona kusvika kune coccyx kune 2-4 mm chete. Murume muduku muduku anodonha mumamniotic fluid, iyo yakareba 2-3 ml. Anobatana naamai kuburikidza nemudambo wembilical uye ramangwana repententa, iro richiri rakakura kudarika mwana pachayo.