Abafazi badla ngokufumana igama elithi "isigaba sabantu" kwiincwadi zonyango kwaye babuze ukuba kuthetha ukuthini.
Sisiphi isigaba sosilandela?
Leli gama lesiqalo sokuqala sesigxina sokuya esikhathini ngaphambi kokuba kuqalwe i-ovulation. Umjikelezo wonke wokuya esikhathini uyahlukana ngezigaba eziliqela:
- isigaba sengqesho;
- sigaba sovulo;
- isigaba sokufunda .
Isigaba sesilandeleko siqala ngosuku lokuqala lokuya esikhathini, kwaye siphela nge-ovulation. Isigaba se-ovulatory sihambelana nokukhululwa kwe-oocyte ukusuka kwintollicle, kwaye emva kokuba iqala isigaba sokubhala.
Isigaba esilandelayo sihlala ixesha elingakanani?
Isigaba sokulandelela siphelela kwi-7 (futshane) ukuya kwiintsuku ezingama-22 (ixesha elide), ubude bayo bude imihla ezili-14. Ngethuba lesigaba, i-endometrium iyalahlwa kwaye ixesha lokuya esikhathini liyaqala. Emva koko, phantsi kweempembelelo ze-hormone (i-FSH) ye-pituitary gland, ukukhula kwe-follicle kuqala kwi-ovary.
Kwi-follicle ekhulayo, i-estradiol ikhiqizwa, phantsi kwefuthe apho isigaba sokusasazeka kwe-endometrium kwisibeletho siqala. Ngokwenyuka kwi-concentration ye-estradiol kwi-follicle, i-inhibin B ikhutshwa ikhulula izinga le-FSH kunye nenani eliphezulu le-estradiol ekuqalekeni kwe-ovulation.
Kwiintsuku ezi-5 zokuqala zesigaba, iifolli ezininzi zikhula, apho iindawo ezininzi zeeseli ezijikeleze i-oocyte kunye ne-follicular fluid zivela. Ngomhla wesi-5 we-7 wesigaba sokulandelelana, enye yeentollicle iba yinto ephezulu, ithola abanye ekukhuleni, kwaye kukukho ukuba inani elikhulu kakhulu le-estradiol kunye ne-inhibin B lihlanganiswayo. Iifolli ezingabonakaliyo eziqalayo ziqhubela phambili ukuphuhliswa kunye nesigxina sabo siphezulu. Ukususela kulo mzuzwana nangaphambi kokuqala kwe-ovulation, ubungakanani bemithombo yamanzi kunye nenqanaba lama-hormone equkethwe kulo, olunefuthe lokulibala kwi-gland gland. Ngaloo ndlela, izinga le-FSH linciphisa, kwaye oku kukuthintela ukukhula kunye nokuvuthwa kwamanye amacwecwe.
Impembelelo yesigaba sopolisi kwi-endometrium
Ukutshintsha kwinqanaba le-estrogens kwiifollicle, kunye nokwanda kwimixholo yabo egazini, kunomphumo olawulayo ekukhuleni kwe-endometrium kwisibeleko. Ngomxholo we-estrogen ophantsi, isigaba sokuqala (ukuphuma kwindoda) kuqala. Kodwa, ngokunyuka kwimixholo yabo, ukuphuma kwegazi kuyayeka kwaye isigaba sokuhlaziywa siqala (kanyekanye nokukhula kobugqwetha) kunye nokwanda (ukukhula) kwe-endometrium kwisibeleko (ngokuhambelana nokukhula kwendoda elandelanayo ). Kwinqanaba le-ovulatory, ngelixa iqanda lishiya ulandelelwano, i-endometrium yesibeleko isilungele ukudibanisa iqanda elityalwe kwi-uterine.