Cigaba da sauri shine daya daga cikin matakai na juyayi. Ogenesis shine sunan kimiyya na aiwatar da samfur a cikin ovaries. Nauyin kwai ya zama mai siffar zobe, yana dauke da kayan gina jiki don tallafin rayuwa na amfrayo a farkon matakai na ci gaba.
Dukkanin jigilar kwayoyin halitta yana sarrafawa ta hanyar hormones, wanda matakin ya tashi, sannan ya rage cikin jini. Yayin da matakin hormone mai tasowa ya ƙaru, ƙwarƙiri ya taso (ripens).
Kwana nawa ne kwancen ya yi girma?
Lokacin da maturation daga cikin ƙwai zai iya wucewa daga kwanaki da dama zuwa wata, amma mafi sau da yawa tsari na kwai maturation daukan makonni 2.
A cikin ɓoye da kansu, an samar da estrogen hormone, ba tare da yaduwar tsohuwar ƙwayar zuma da kuma ovulation ba zai yiwu ba. Lokacin da estrogen ya kai wani matakin (matsakaicin), glanding greasing sharply ƙara ƙara wani nau'i na hormone, luteinizing. A ƙarƙashin rinjayar wannan hormone, ƙananan tsire-tsire suna barin jaka, kwayar halitta tana faruwa.
Wasu lokuta akwai nau'i nau'i na qwai biyu, tare da haɗakar juna wanda haske zai bayyana jima. Ba dole ba ne za su kasance da kamanni, saboda sun bambanta. Amma idan a cikin rabuwa wanda aka hadu da takarda ya rabu zuwa kashi biyu ko fiye, to, za a haifa maima biyu m biyu.
Kwayar ƙwayar mace, wadda kwayar lafiya mai kyau zata iya bunkasa ta hanyar haɗuwa, ya ƙunshi nau'in ɓangaren chromosomes. Sakamakon karshe ya dogara ne da wane ɓangaren chromosomes da ƙwangiyar ya sami. Idan a lokacin maturation a cikin kwai akwai yiwuwar tsarin chromosomes ko canji a cikin adadin su, to, yana da nau'in hauka. Idan irin wannan ƙwayar ya kasance wanda aka lalace, to, a mafi yawan lokuta amfrayo yana tasowa daga gare ta ya mutu a daya daga cikin matakai na ciki.
Yaushe ne yaro ya shirya don hadi?
Bayan yaduwar kwayar cutar ya faru kuma yarinya ya fara fitowa daga abin hawa a cikin rami na ciki, an kama shi da bututun fallopian kuma an kai shi zuwa ciki. Yaro a hankali ya sauko da bututu zuwa mahaifa. Wannan shine lokaci mafi dacewa don haɗuwa da kwai. Idan hadi ba zai faru ba, to a cikin sa'o'i 24 ne yaron zai mutu. Don ƙara yawan halayyar zane, dole ne ka san ranar da kwan ya fara. Yawanci yawan kwai mai tsayi yana shirye don hadi a rana ta 14 na sake zagayowar. Yau shine mafi kyawun hadi.
Me yasa kwai ba zai iya farfaɗo ba?
Akwai dalilai da dama don wannan sabon abu. Mafi yawan su shine:
- matsalolin da kwayoyin halitta, lokacin da juyayi ya kasance takaice ko, a wani lokaci, tsayi. Akwai haɗari cewa kwai ba zai iya samar da shi ba ko kuma ba zai yiwu ba;
- rashin jin dadi na ovaries saboda rashin aikin samar da kwayoyin da ake bukata, wanda shine dalilin da ya sa tsarin damuwa na jabu ya damu. Yawan a cikin wannan yanayin ko dai ba ya da tushe, ko kuma ba zai iya yiwuwa ba. Matsanancin matsalolin wasu lokuta yakan haifar da cikakkiyar rashin haila da kuma maturation na qwai. Rashin haɗari na iya shafar ba kawai jima'i ba, amma har da thyroid pancreas;
- cututtukan kwayoyin halitta, irin su Turner's syndrome, ya haifar da haihuwar 'yan mata wadanda basu da kyau ko kuma basu da cikakkiyar ovaries, wanda ke haifar da aiwatar da ƙwayar kwai;
- cututtuka daban-daban da cututtuka - polycystic ovary, ƙetare a cikin canji na kwakwalwa, yashwa na cervix, lalacewa ga tubes na fallopian, scars a kan membran membranes bayan tiyata - duk wannan yana haifar da asarar ko cikakkiyar damar iya samar da cikakken ovum.
