Kutalika kwa kuzungulira kwamchiberekero kumasiyana kwambiri kuyambira mzimayi wina ndi mzake, ndipo ngakhale kuzungulira kwina kupita kwina. Pakakhala msambo wautali, kutulutsa mazira kumachitika pambuyo pake, osakhudza chonde.

Monga chikumbutso, nthawi yopanga ovulatory imakhala ndi magawo atatu osiyana:

• gawo lotsatira imayamba tsiku loyamba kusamba. Amadziwika ndi kusasitsa kwamitundu yambiri yamchiberekero chomwe chimachitika chifukwa cha follicle-stimulating hormone (FSH);
• ovulation chikufanana ndi kuthamangitsidwa kwa oocyte chifukwa cha follicle yayikulu yamchiberekero yomwe yakula msinkhu, chifukwa cha kuchuluka kwa mahomoni a luteinizing (LH);
• Pakati pa gawo luteal kapena post-ovulatory, "chipolopolo chopanda kanthu" cha follicle chimasanduka corpus luteum, yomwe imayamba kupanga progesterone, yomwe gawo lake limakhala kukonzekera chiberekero kuti chitha kuikidwa dzira la umuna. Ngati sipanakhale umuna, kutulutsa uku kumayima ndipo endometrium imachotsedwa kukhoma lachiberekero: awa ndi malamulo.

Kuzungulira kwamchiberekero kumatenga masiku 28, ndikuchotsa mazira tsiku la 14. Komabe, kutalika kwa kayendetsedweko kumasiyanasiyana pakati pa azimayi, ndipo ngakhale pakati pamaulendo azimayi ena. Gawo luteal lomwe limakhala ndi masiku 14 osagawika, pakakhala nthawi yayitali (masiku opitilira 30), gawo lotsatira limakhala lalitali. Kutulutsa mazira kumachitika pambuyo pake. Mwachitsanzo, pakuzungulira kwamasiku 32, kutulutsa mazira kumachitika tsiku la 18 (32-14 = 18).

Komabe, uku ndikungowerengera kokha. Pakakhala nthawi yayitali komanso / kapena mayendedwe osasinthasintha, kuti athandize mwayi wokhala ndi pakati, ndibwino kuti mutsimikizire kuti pali ovulation, mbali inayo kuti mudziwe tsiku lake molondola. Pali njira zosiyanasiyana zomwe mkazi angachitire yekha, kunyumba: kutentha kotentha, kuyang'ana kwa ntchofu ya khomo lachiberekero, njira yophatikizira (kutentha kotentha ndikuwona ntchofu ya khomo lachiberekero kapena kutsegula kwa khomo pachibelekeropo) kapena kuyesa kwa ovulation. Chotsatirachi, kutengera kudziwika kwa mkodzo wa LH surge, kukhala wodalirika kwambiri pachibwenzi.

Sitikudziwa zomwe zimayambitsa kuchepa kwa mazira mochedwa. Nthawi zina timalankhula za mazira "aulesi" popanda kudwala. Tikudziwanso kuti zinthu zingapo zimatha kukhala ndi gawo pakuchulukitsa kwamphamvu polimbikitsa hypothalamic-pituitary axis poyambira kutulutsa kwa mahomoni a FS ndi LH: kusowa kwa chakudya, kusokonezeka kwamaganizidwe, kupsinjika kwakukulu, kuwonda mwadzidzidzi, anorexia, kwambiri kulimbitsa thupi.

Pambuyo poyimitsa mapiritsi akulera, zimakhalanso zachizolowezi kuti mayendedwe azikhala aatali komanso / kapena osasamba. Ikani kupumula kwa nthawi yolera, thumba losunga mazira limatha kutenga kanthawi kuti libwezeretse ntchito yanthawi zonse.

Kutulutsa nthawi yayitali sikuyenera kukhala ovulation yoyipa. Kafukufuku waku Spain wofalitsidwa mu 2014 mu Magazini aku Europe azachipatala & gynecology, ngakhale kuwonetsa zosiyana (1). Ofufuzawo adawunikiranso mayendedwe azimayi azaka pafupifupi 2000 omwe adapereka ma oocyte, komanso kuchuluka kwa pakati mwa omwe amalandira. Zotsatira: zopereka za dzira kuchokera kwa azimayi omwe amakhala ndi nthawi yayitali zimalumikizidwa ndi kuchuluka kwa pakati mwa omwe alandila, kuwonetsa ma oocyte abwino.

Mbali inayi, ngati zozungulira zizitalika, zimachepera mchaka. Kudziwa kuti zenera la chonde limangokhala masiku 4 mpaka 5 pakazungulira komanso kuti mwayi wokhala ndi pakati ndi pafupifupi 15 mpaka 20% pakazunguliridwe ka banja lachonde logonana nthawi yabwino (2), mu zochitika zazitali, mwayi wokhala ndi pakati udzachepetsedwa kwambiri.

Ngati masanjidwewo adasiyanitsidwa pomwe anali am'mbuyomu (masiku 28), ndibwino kufunsa kuti mupeze vuto lomwe lingakhalepo m'thupi.

Nthawi zina kuzizungulira kwakanthawi komanso / kapena kosazolowereka kumatha kukhala chimodzi mwazizindikiro, pachithunzi chachikulu, cha polycystic ovary syndrome (PCOS) kapena ovarian dystrophy, matenda a endocrine omwe amakhudza 5 mpaka 10% ya azimayi azaka zobereka. kubereka. PCOS sikuti nthawi zonse imayambitsa kusabereka, koma ndichizindikiro chofala cha kusabereka kwazimayi.

Nthawi zonse, mosasamala kanthu za kutalika kwa nthawi, ndibwino kuti mufunsane pakatha miyezi 12 mpaka 18 ya mayeso osakwanira a ana. Pambuyo pa zaka 38, nthawi imeneyi yachepetsedwa kukhala miyezi 6 chifukwa kubereka kumachepa kwambiri pambuyo pa msinkhu uwu.