Oocyte kuibvisa uye muchangosangana

Female gamete (oocyte) dzinokura uye anochengeterwa ovaries. Chimiro nezvinangwa zvaro mashandiro inozviisa nokusingaperi dzinongoitika muitiro wokuberekana pakati mhando. Kuti zai chinozadziswa chose ayo basa, rine nechekuita mukugarisana kwemapurotini uye mafuta kuti uvake muviri masero ari kutanga kwekupwanyiwa paumbwe chipenyu muviri. Danho iri rinonzi zygote - munhu tandem vanhukadzi uye vanhurume masero. Kusvikira nguva aida dumbu uye kugamuchira kunovaka muviri kubva rwaamai muviri aiva zai anopa simba kune remangwana azvarwa.

ovum neerekitironi rine 23 hundi chromosome. The yasara makumi matatu iye anopa mbeu.

oocyte kuibvisa rikaitika follicle. Sezvineiwo, okutanga follicles dzakadaro dzinotanga kuumbika ari mukadzi mwana achiri mudumbu pamusoro namaviri vhiki. Over nguva, nhamba yavo iri kuwedzera nokukurumidza, uye ipapo kunoderedza. Saka, muna utero kunogona kusvika mamiriyoni manomwe, asi nguva kutanga wokutanga kumwedzi ndizvo zvitatu namazana chete namazana.

muviri A mukadzi zvakagadzirirwa kuti nhamba follicles haina kwakawedzera, ivo chete vofa. Nekuti zera makore makumi matatu namashanu dzaiva zviuru makumi maviri nezvishanu chete, uye kubereka - vanenge chiuru. Ndokusaka pamuviri pashure makumi matatu nemashanu ari matambudziko, sezvo kuibvisa kuti oocytes mune mhando ishoma, kunyange zvazvo zvichiita.

Munguva yose nguva upenyu mazai vakura anogona Fusion pamwe urume kuibvisa uye zvakare, vari akaumba chete uwandu zvidimbu mazana mana, namazana mashanu. The OVA yasara vanourayiwa. Izvi ndizvo zvinoitika muitiro. Pashure kuibvisa of zai havagoni kuva akawanda - pamuviri pemapatya uye vatatu anonzi isingawanzowanikwi uye wakakomborerwa nokurerwa vana panguva imwe nguva vaiona kuti zvinyorwa. Nokudaro zvisikwa inodzora kubereka.

zai inotungamirwa - kunzwisisa multi-yakati muitiro. In yokutanga nguva, chokuwanziridza of follicles - kwawaiita musikana ichiri utero. Danho rechipiri - kukura follicles. Vanokura dzose nguva vasati vanotanga kuyaruka. Chechitatu nguva - the kuibvisa of zai. Panguva imwe neimwe kumwedzi mu muviri mumwe mukadzi dzinokura, rimwe zai, kashoma pangava zviviri kana zvitatu. Izvi zvinonzi superovulation. Muchiitiko chino, pane mukana mapatya kana vatatu simba.

Sezvo nhengo dzokubereka kushanda mwana inochengeterwa mudumbu, amai vake ane rakakura yeramangwana wake mwanasikana. Kana amai kutora doro, kusvuta, kushandisa zvinodhaka, kuita zvepabonde chirwere vanotambura, burdeness kwakadaro kunogona kukanganisa hwepabonde haisati kuzvarwa musikana.

Oocyte kuibvisa ari follicle kunoitika napo. Mwedzi wega wega, follicle inokura, zvinoita sokuti mukati mhango pamwe fluid uye mukati mhango anoenda chitsama pamwe zai. Follicle pa kukura nani guru - anenge maviri masendimita ari dhayamita. Kana follicle dzinokura, izvozvo inoparusa uye zai unobuda mairi. Kusunungurwa zai inonzi ovulation - nayo "kumuvandira" vaviri uyo usingagoni pamuviri. Sezvo iye anogara pedyo zai zuva, vaviri anoda vana, ndiko kupa nekukurumidza musangano zai dzisingaoneki kuti pakusangana kwakaitika. Kana munguva ino pakusangana kumboitika, ipapo tinofanira kumirira mumwe mwedzi - panguva oocyte kuibvisa.

Kana nedanho zai uye dzisingaoneki musangano riri kubudirira, nokukurumidza kuti pachavo akanzwa zviratidzo wekusangana ari zai. Kutsiva mari hormone hurongwa, kuti zygote kuchaita kuisa muchibereko chemusikana, kumisa kumwedzi, uye pamuviri anotanga.

Women kuronga pamuviri arangarirwe kuti kuibvisa of zai - zvichiitika akatunhidzwa kwazvo uye kugumbuka. Regai mwoyo kana izvi zvikasaitika iri mwedzi mudanga pabonde upenyu ane naye wokutanga. Iyi haisi chikonzero kutaura mbereko. Pane anovulatory zvinogara, kana zai haina yakura zvachose - muviri wakazorora. anofanira chete pashure pegore dzose pabonde upenyu pamwe chete inofanira kuongororwa nachiremba uye kutanga kurapwa kana zvakakodzera.