Qe loj hlob yog ib qho ntawm cov theem ntawm kev coj khaub ncaws. Ovogenesis yog lub npe ntawm cov txheej txheem ntawm cov qe tsim nyob rau hauv lub zes qe menyuam. Cov duab ntawm lub qe yog spherical, nws muaj ib tug nutrient mov rau lub neej kev them nyiaj yug ntawm lub embryo ntawm thawj theem ntawm kev loj hlob.
Tag nrho txoj kev coj khaub ncaws yog tshuaj los ntawm cov tshuaj hormones, qib uas thaum ntawd nce, ces txo cov ntshav. Thaum qib theem ntawm qhov hnoos qog txhaws lawm, cov qe tsim (ripens).
Hnub nyoog pes tsawg hnub yog lub qe paub tab?
Lub sij hawm ntawm maturation ntawm lub qe yuav los ntawm ob peb hnub mus rau ib lub hlis, tab sis feem ntau cov txheej txheem ntawm qe maturation yuav siv sij hawm 2 lub lis piam.
Hauv cov hauv paus ntawm lawv tus kheej, hormone estrogen yog ua, tsis muaj lub cev qe maturation thiab ovulation yog tsis yooj yim sua. Thaum tshuaj estrogen nce mus txog qee theem (qhov siab tshaj), pituitary gland sharply tsub kom zus tau lwm hom tshuaj hormone, luteinizing. Nyob rau hauv tus cawv ntawm no hormone, ovum mature yoojyim lub follicle, ovulation tshwm sim.
Qee lub sij hawm muaj ib qho simultaneous maturation ntawm ob lub qe, nrog simultaneous fertilization ntawm uas lub teeb yuav tshwm ntxaib. Tsis tas lawv yuav zoo sib xws, vim lawv txawv. Tab sis yog hais tias nyob rau hauv tus txheej txheem ntawm faib ib fertilized qe mus rau ob los yog ntau qhov chaw, ces tag nrho identical ntxaib yuav yug.
Tus poj niam germ cell, los ntawm qhov tus kabmob noj qab nyob zoo tuaj yeem tsim tau los ntawm fertilization, muaj haploid (ib) txheej chromosomes. Qhov kawg tshwm sim nyob ntawm seb cov txheej ntawm chromosomes lub qe muaj. Yog hais tias thaum lub sij hawm maturation nyob rau hauv lub qe muaj ib tug ua txhaum ntawm tus qauv ntawm chromosomes los yog ib tug hloov nyob rau hauv lawv cov xov tooj, ces nws yog ib qho txawv txav. Yog hais tias zoo li no qe yog impregnated, ces feem ntau lub embryo los ntawm nws tuag ntawm ib theem ntawm kev xeeb tub.
Thaum twg lub qe npaj txhij rau fertilization?
Tom qab cov ovulation tau tshwm sim thiab cov qe nplhaib tau tshwm sim los ntawm cov tshuaj mus rau hauv lub plab, nws yuav yog los ntawm txoj hlab ntuag thiab tau hais rau nws sab hauv. Lub qe maj mam descends lub raj rau lub tsev menyuam. Qhov no yog lub caij nyoog zoo tshaj plaws rau lub fertilization ntawm ib lub qe. Yog hais tias fertilization tsis tshwm sim, ces nyob rau hauv 24 teev lub qe yuav tuag. Yuav kom nce tau txoj kev xav ntawm lub neej, koj yuav tsum paub txog hnub twg lub qe qaub. Feem ntau ib lub cev qis yog npaj txhij rau kev siv tshuaj yaj thaum hnub 14 ntawm lub voj voog. Hnub no yog qhov feem ntau txaus siab rau fertilization.
Vim li cas thiaj muaj qe tsis siav?
Muaj ntau ntau yam rau qhov tshwm sim no. Qhov ntau ntawm lawv yog:
- teeb meem nrog cov ovulation, thaum kev coj khaub ncaws dhau los yog, hloov dua siab tshiab, ntev ntev. Muaj ib qho kev pheej hmoo tias lub qe tsis tau siav los yog tsuas yog siv tsis tau;
- kawg ntawm lub zes qe menyuam vim muaj kev tsis taus ntawm cov tsim cov tshuaj hormones, uas yog vim li cas cov txheej txheem ntawm maturation ntawm lub follicle yog cuam tshuam. Lub qe nyob rau hauv cov ntaub ntawv no yog tsis ntab txhua, los yog tsis muaj peev xwm. Hormonal teeb meem tej zaum kuj ua rau kev tsis tuaj yeem ua poj niam cev xeeb tub thiab qhov loj hlob ntawm qe. Kev ua txhaum yuav cuam tshuam tsis tau tsuas yog cov tshuaj hormones, tab sis kuj yog cov thyroid pancreas;
- caj ces, xws li Turner's syndrome, ua rau yug cov menyuam ntxhais uas tsis tshua tsim lossis tsis ua tiav zes qe menyuam, uas ua rau cov qoob loo tsis tuaj;
- ntau cov kab mob thiab cov kab mob - tus poj niam yug menyuam, kev ua rau cov hlab ntsws ntawm ncauj tsev me nyuam, qhov ncauj ntawm qhov ncauj tsev menyuam, kev puas tsuaj rau cov hlab ntaws, kev nti ntawm lub zes qe menyuam tom qab kev phais - tag nrho qhov no ua rau tag nrho los sis ib nrab poob ntawm rab peev xwm los ua ib qho ovum tag nrho.
