A fetal egg inomukomana uye jira re embryonic. Iyi nguva yekuzvitakura ndiyo danho rekutanga rekukura kwekuita pamuviri. Uye zvinhu zvose zvinotanga nekubatana kwemasero maviri - vakadzi nevarume.
Zvadaro, yei inoberekwa inotanga kuparadzanisa, pakutanga kune zvikamu zviviri, uye kusvika 4 nekudaro. Nhamba yemasero, kufanana nekukura kwembryo, inoramba ichikura. Uye boka rose remasero rinoramba richiparadzanisa, famba uchienda kune hutatu hunoenda kunzvimbo yekuiswa kwawo. Iri boka remasero ndiro chibereko chezai.
Sezvo wasvika pane chinangwa, fetal egg inowanikwa mune rimwe remadziro emuviri. Izvi zvinoitika musvondo mushure mekuberekwa. Kusvikira panguva ino fetal yai inodyisa zvinhu zviri muzai pachayo. Uye mushure mokunge uchitanga kupinda muchibereko, kudya kunoitwa kunoitwa nekutuka mucosa, yakagadzirirwa kuronga nekugadzira embryo kusvika pakuumbwa kweparcenta.
Inzvimbo, kana kuti nzvimbo yemwana , inoumbwa kubva kune imwe kunze kwechechi ye fetal, yakazara nevilli. Iyi villi munzvimbo yekubatanidza kwe fetal egg inoparadza chikamu chiduku chechibereko chemukati, uyewo masvingo emidziyo yeropa, kuzadza iro neropa ndokupinda munzvimbo yakagadzirirwa.
A fetal egg ndiyo chiratidzo chekutanga chekuita pamuviri. Inogona kuonekwa pa ultrasound mushure mamavhiki maviri ekuenda kumwedzi. Iyo embryo inowoneka chete pavhiki yechishanu yekuzvitakura. Asi kana panguva ino chiremba anocherechedza kusavapo kwemwana mucheche-mumamwe mazwi, chibereko chisina chinhu, ultrasound inodzokororwa kwemavhiki mashoma gare gare.
Kazhinji kazhinji munyaya iyi, pamasvondo matanhatu kusvika ku7, embryo uye kutengesa kunotanga kuonekwa. Kana iyo fetal yai ichiri isina chinhu, izvi zvinoratidza kubata kusina kukura. Mukuwedzera pane zvinetso izvi, mumatanho ekutanga ekudzivirira, panogona kunge kune vamwe - chimiro chisina kukodzera che fetal egg, nzvimbo yayo isina kunaka, musasa, nezvimwewo.
Ndicho chikonzero nei zvakakosha kupfuudza ultrasound nokukurumidza sezvinobvira kuitira kuti ugone kuchinja mamiriro acho ezvinhu kana zvichikwanisa kugadziriswa. Pashure pezvose, mumutatu wekutanga mutengo wekusununguka kwepasipo, mauto uye mamwe mararamiro akanaka. Asi zvakakwana pamusoro pekusuruvara.
Iyo fetal egg mumavhiki ekutanga ekudzivirira ine maitiro ehuta. Uye ultrasound inowanzotarisa mukati maro kupenya - SVD ye fetal egg. Sezvo kubwinya kwe fetal egg kunoshanduka, pane kukanganisa mukugadzirisa nguva yekuita kwechimiro chechimiro che fetometric.
Pakati pevhesi, iko kukanganisa kwemavhiki mashanu. Nguva yekuita muviri, sekutonga, inotsanangurirwa kwete nechiratidzo ichi chete, asiwo hutsika hweCTE ye fetus (coccygeal parietal size) uye mamwe emiganhu inoshandiswa.
Mazai mazai mashizha nemavhiki
Saka, ukuru hwema fetal egg nemavhiki. Kana iyo fetal yai ine 4 mm muhupamhi, izvi zvinoratidza nguva pfupi - kusvika masvondo matanhatu. Zvingangodaro, kuti ikozvino fetus egg inofananidzwa nenguva yevhiki 4. Pamasvondo mashanu, SVD iri 6 mm, uye pamasvondo mashanu uye nemazuva matatu fetal yai inorema 7 mm.
Pamasvondo matanhatu, fetal yai inokura kusvika 11-18 mm, uye inowanikwa mukati memazana emusana we fetal pa 16 mm inoenderana nenguva yevhiki 6 uye mazuva mashanu. Pamasvondo manomwe ekuzvitakura, SVD inoenda kubva pa19 kusvika 26 mm. Pamasvondo masere, fetal egg inokura kusvika 27-34 mm, mumapfumbamwe 9 kusvika kune 35-43 mm. Uye pamagumo emavhiki gumi, fetal egg inokura inenge 50 mm inomita.
Kumubvunzo - kukurumidza kwei fetal egg inokura, tinogona kutaura nechivimbo: kusvikira masvondo 15-16 hukuru hwayo hunowedzera ne 1 mm zuva rimwe nerimwe. Uyezve, uwandu hwenheta ye fetal inowedzera 2-2.5 mm pazuva.
Maitiro ehukuru hwe fetal egg uye fetus anogonawo kuteverwa maererano neetafura.