Mavhiki gumi nemaviri ekudzivirira ndewezuva rinokosha remukadzi, sezvo ichi chiri kuguma kwekutanga kwetatu. Munguva iyi, placenta inobereka progesterone yakakwana, uye nekuparara kwehomoni, basa rejena rinowira zvishoma nezvishoma. Panguva ino, yekutanga katatu yakarongedzwa (kubva pa11 kusvika ku13 masvondo uye nemazuva matanhatu), kuti ione boka rekuchengetedzwa kwechromosomal risina kunaka, uye yekutanga ultrasound pakuberekwa . Ultrasound pamasvondo gumi nemaviri ekuberekwa, fetal development inoratidza zvakajeka chaizvo, kunyanya kujekesa.
Chimwe chiyeuchidzo chinokosha, icho chine chimwe chezvinhu zvinokosha zvinokosha, ndeye CTE ye fetus pamasvondo gumi nemaviri. Ichi chiratidzo chinoshandiswa kutsanangura hukuru hwe fetus uye kuverenga nguva yekuzvitakura pamwe chete nehuwandu hunorema. Kubwinya kwemavhiki gumi nemaviri kunenge anenge masendimita mashanu nemakumi maviri nemashanu (60 cm). Kana kukura kwemukati kwemazuva kwakapfuura pasina matambudziko, uye yakakura ne1 mm pazuva, ipapo hutumbi hwemunhu hwemavhiki gumi nemaviri huchikurumidza kukura kusvika ku 1.5-2 mm pazuva. Vanachiremba vanokurudzira kuenzanisa kweCTE yemucheche pavhiki 11 kana 12.
Iko kunofanirwa kutakurwa mupfungwa kuti ukuru hwekodhigeal-parietal ukuru hunoenderana nekureba kwehupombwe kusvika mukati mezuva, saka kukanganisa kwakajairika kwemazuva matatu kusvika mana. Izvo zvinowanzoreva CTE ye embryo is 51 mm. Nekutsauka kuduku, usanetseka - kushambadzira kwemasikati kubva kune 42 kusvika ku 59 mm kunogona.
Kana tichienzanidza, tinoratidza CTE ye fetus pamasvondo gumi nemana: iyo yakakosha inokosha 42 mm, kuputsika kunobvumirwa muzvigadzirwa ndeye 34-50 mm. Kana uchienzanisa zvikwangwani izvi, unogona kuona kukosha kwezuva nezuva kune ultrasound.
Embryo 12 masvondo
Kuvanaamai vamangwana iyo inofadza kuti inotaridzika sei uye kuti chibereko ichi chinogona kuitei mumavhiki gumi nemaviri. Munguva ye ultrasound, amai vanogona kuona kuti mwana wavo anoyamwa sei, uye anonzwa 110-160 kurova paminiti achirova mwoyo muduku. Mwana wacho anofambisa uye anotendeuka mumucheche wechechi, chifuyo chinoburuka uye chinomuka panguva yekufema. Uyewo, chibereko chacho chave chakwanisa kukanganisa, svinura muromo wako uye chengetedza minwe yako.
Nezvekuratidza zvirongwa, zvakakosha kucherechedza kuchenesa kwetemmus gland, iyo inokonzera kubudiswa kwemarikirini nemuviri uye kukura kwehutachiona. Ikoko chirwere chepituitary chinotanga kubudisa mahomoni anokanganisa kukura kwemucheche, muviri wemetabolism uye kubereka kwemuviri. Chiropa chema embryo chinotanga kubereka bile, izvo zvichabatsira mukudya kwezvokudya. Iyo yekudya gadziriro yakagadzirira kugadzira glucose.
Iyo embryo inorema inenge 9-13 gm kwevhiki gumi nembiri, chibereko chinobuda uye chiri munzvimbo yakagara. Iyo yakareba kubva korona kuenda ku sacrum inenge 70-90 mm. Mwoyo wemukomana uyu panguva ino ine makamuri mana: maviri atria uye maviri ventricles, uye nguva yakawanda yezvipikiso zvinokonzera kubva pamasere kusvika ku1 160 kurova paminiti. Mafupa ematenga anotanga kuumba, mazino emeno emukaka, uye mumarara, tambo dzezwi dzinoumbwa.
Iyi nguva yekusimudzira vakomana inonyanya kukosha. Muchiito chekuita chiito che testosterone, icho chinobudiswa nehutano hwepabonde hwevakomana, nhengo dzomukati dzomukati dzinotanga kuumba - chirume uye chinonzi scrotum. Kana kukanganisa kwebasa iri, hermaphroditism inogona kuonekwa.
Amai vanonzwa sei pamasvondo gumi nemaviri ekudzivirira?
Mune nzira yakakwana yekudzivirira uye kukura kwe fetal, mukadzi ane pamuviri anofanira kuwana kubva pa8 kusvika ku3.6 kg. Muyero wekurema kunowanikwa pakati pe 300 ne 400 gm ngevhiki. Paunenge uchienzanisa uremu hunopfuura hunowanzoitika, unoda kuderedza nhamba yemakrohydrates (sweets, cookies, halva, etc.).
Vakadzi vakawanda vane hanya nezvekuonekwa kwezuva rino remavara akavezwa pamusoro pechiso, mutsipa, chifuva, uyewo kuonekwa kwemutsara werima kubva pamabheji kusvika ku pubis. Zvisinei, haufaniri kunetseka, izvi zvinoratidzika kuratidzwa, uye vachakurumidza kuberekwa zvakare.
Imbryo pamasvondo gumi nemaviri yakapfuurira kubudirira nenzira yemumishinari uye mushure mevhiki 12 inonzi fetus. Muchikamu chedu, amai vekuuya vachawana ruzivo rwakakosha kune iye oga, kuitira kuti vazive zviri nani nezvemwana wavo wemangwana.