Zygote ndizvo kubatanidzwa kwezai nembeu. Inozivikanwa zvakare sezai rakasanganiswa. Zygote inotanga sesero rimwe chete asi rinopatsanurwa nekukurumidza mumazuva mushure mekusangana. Sero rimwe chete rezygote rine machromosomes 46 anodiwa, kuwana makumi maviri nematatu kubva kumbeu uye 23 kubva muzai.
Chikamu chezygote chipfupi uye kunotora mazuva anenge mana. Munenge zuva rechishanu, huwandu hwemasero hunozivikanwa se blastocyst. Embryo inokura kubva mublastocyst iyi.
Mazygotes anoumbwa sei?
Kuti vanhu vaviri vabereke, zvinongodiwa chete kuti mbeu imwe chete ipinde kunze kwezai panguva yekusangana. Munguva yehutano hwekubereka, zai rimwe chete rinoburitswa kubva mufollicle richipinda mu fallopian chubhu panguva yekuzvara. Kana urume huripo, zviuru zvinoedza kupinza zai rimwe chete iri. Kana urume hukapinda nekunze kwekunze, zygote inoumbwa. Kuchinja kwemakemikari pamusoro pezai kunodzivirira imwe mbeu kuti isapinda mariri. zvakare.
Kubata pamuviri kunobatsirwa nemishonga kunobvirawo, uye, kutaura idi, kuri kuwedzera kuwanda. Intrauterine insemination uye in vitro fertilization ndiyo nzira mbiri dzinoshandiswa zvakanyanya kubatsira kubereka.. Munguva ye intrauterine insemination, urume hunopinzwa muchibereko kuburikidza necatheter uye kusangana kunoitika mukati memuviri. With the in vitro kusangana, mazai acho anobviswa muma<em>ovaries uye anoberekeswa murabhoritari. Iyo blastocyst inobva yaiswa muchibereko.
Kubva pazygote kusvika ku "embryo".
Mazygotes anopatsanurana kuburikidza nemaitiro anozivikanwa semitosis, umo sero rimwe nerimwe rinodzokorora. Iyi nhanho yemavhiki maviri inozivikanwa senguva yekukura uye inotangira kubva pakusangana kusvika pakuiswa kweblastocyst muchibereko. Urume sero rine ruzivo rwekuberekerwa kwababa, ukuwo zai rezai rine ruzivo rwemajini.. Nekuti sero rimwe nerimwe rine hafu yeiyo genetic zvinhu, sero rimwe nerimwe rinozivikanwa sero haploid. Kana masero maviri aya ehaploid abatana, anoita sero rimwe chete re diploid rine machromosomes anodiwa.
Zygote inobva yafamba ichidzika ne fallopian chubhu ichienda kuchibereko. Sezvainofamba, masero ayo anoparadzana nekukurumidza uye inova blastocyst. Kana yapinda muchibereko, blastocyst inofanira kuisirwa mujira tora chikafu chaunoda kukura uye kurarama. Embryonic nguva yekukura inotora kubva mavhiki maviri mushure mekubata pamuviri kusvika pavhiki yechisere., panguva iyo muviri unozivikanwa se "embryo". Muvhiki yepfumbamwe mushure mekubata pamuviri, nguva ye fetus inotanga. Kubva panguva iyi kusvika pakuzvarwa, chisikwa chinozivikanwa se "fetus".
Danho rekutanga harina kusimba
Haasi ese mazygotes anosvika padanho rinotevera rekukura kwemudumbu. Chikamu chikuru chepfungwa dzese dzinongoitika dzega dzinokundikana pamberi kana panguva yekusimwa. Vatsvakurudzi vanofungidzira kuti kurasikirwa uku kune chokuita nekusagadzikana. Muzviitiko zvekudzoka kwepamuviri, chromosomal abnormality yevabereki inowanzopomerwa. Panyaya yekupfupfudzika kwekutanga uku, mukadzi anogona kusaziva kuti asangana nekuti anogona kubuda ropa rakafanana nerekuenda kumwedzi kwake.
Intrauterine insemination uye in vitro fertilization inogonawo kukundikana. Zvidzidzo zvakabatanidza hurombo husina kumira zvakanaka nekutadza kuburitsa. intrauterine insemination. Mazai asina kunaka uye kushaya simba kwehomoni ndezvimwe zvikonzero zvinozivikanwa zvekukundikana kweiyi nzira yekubereka. Kubudirira kweIVF kunosiyana nezera. In vitro fertilization ine mukana mukuru wekubudirira muvabereki vari pasi pemakore makumi matatu nemashanu. Zvinhu zvinogona kukanganisa kubudirira kana kukundikana kweIVF zvinosanganisira zera revabereki, kubata pamuviri nekurasikirwa kwekare, kushanda kwemazai, uye chikonzero chinokonzera kushaya mbereko.