Nguva ye embryogenesis, kureva kuti, apo embryo inokura uye inokura, inotangira kubva kune yekutanga kusvika pa11 kusvika ku12 yevhiki yekuzvitakura. Mushure menguva iyi, embryo yakatoti "fetus". Muchiitiko ichi, zuva rokutanga rekupedzisira kuenda kumwedzi kunotorwa sekutanga kutanga.
Kubudirira kwehupenyu hutsva kunotanga nenguva iyo iyo yechikadzi inobatanidzwa. Apo spermatozoon uye ovum inosanganiswa, zygote inoumbwa, iyo inotanga kugovana mumaawa makumi matatu nemaawa makumi matatu nemaviri uye inogadzira dial mulluellar embryo, iyo yakakura iyo iyo, sezvavanotaura, inowedzera nokukwira uye kumiganhu.
Kana mumazuva mana okutanga ekuvapo kwayo, embryo inosvika inenge 0,4 mm, uye pazuva rechitanhatu inosvika 0,2 mm, uye pakuguma kwechinomwe - 0.3 mm.
Pazuva 7-8, iyo embryo inoshandiswa muuranda uterine.
Pazuva rechigumi nematanhatu rekufambira mberi, ukuru hwembryo inenge 2 mm.
Shanduka muhutachi hukuru nevhiki yekuzvitakura
- pavhiki yechitatu yekusimbiswa kwema embryo, ndiko kuti, pavhiki yechishanu yekuzvitakura, ectoderm panzvimbo yekusangana kwepamuviri yemwana inoumba groove. Zvadaro miganhu yaro yakavharwa uye neural tube inoumbwa - inoratidzirwa nehupenyu uye huropi. Pakupera kwevhiki ino, embryo inosvika 4 mm;
- Muvhiki yechina, nheyo yepamusoro yenheyo inoumbwa kubva ku-neural tube - iyo inoputika uye uropi. Mwoyo unogadzira kukanganisa kwekutanga. Kunoratidzika ruzha rwemakumbo, maoko, maziso uye nhengo dzomukati, dzinotanga kuerera ropa kuburikidza nemidziyo yeropa;
- mumavhiki mashanu kusvika ku6, musoro uye chiso chemukati embryo zvinoumbwa. Kureba kwayo ndeyomurairo we1 cm
- pavhiki 7 mitezo inowedzera uye inotanga kuumba mapapu. Yakazara mwoyo. Ukuru hwembryo i 1.5 cm;
- pamasvondo masere ose nhengo dzinokosha dzinenge dzichigadzirwa. Ukuru hwembryo inenge 2 cm;
- pamavhiki 9 zvakajeka nzeve dzinoonekwa, mhino, maziso, muromo, meso. Kureba kwecheche inenge 3 cm uye inoramba ichikura nokukurumidza;
- pamasvondo gumi, ndiko kuti, pamasvondo gumi nemaviri ekuzvimba, sarudzo yemasaga yakazara zvakakwana kumunhu. Mitezo yakareba. Ropa romwana rinowanikwa boka rayo. Ukuru hwembryo, iyo zvino inoshandiswa kuva chimiro che fetal, inogona kusvika 7 cm.
Kuwedzera kwehukuru hwembryo kunogona kutevedzwa maererano neetafura iri pasi apa.