Thaum koj xav kom muaj menyuam, nws yog ib txwm cia siab tias kev xeeb tub yuav tshwm sim sai li sai tau. Txhawm rau ua kom zoo rau koj txoj kev muaj peev xwm cev xeeb tub sai, nws yog qhov tseem ceeb los xam koj hnub ovulation kom koj paub lub sijhawm zoo tshaj plaws los xeeb tub.

Yuav kom muaj menyuam, yuav tsum muaj fertilization. Thiab kom muaj fertilization, koj xav tau oocyte ntawm ib sab thiab phev ntawm lwm tus. Txawm li cas los xij, qhov no tsuas yog tshwm sim ob peb hnub nyob rau ib hlis. Txhawm rau kom koj muaj feem ntau ntawm cev xeeb tub, yog li ntawd nws yog qhov tseem ceeb txhawm rau txheeb xyuas qhov "lub qhov txhab yug menyuam", lub sijhawm zoo rau kev xeeb tub.

Rau qhov no, nws yog qhov tseem ceeb los xam hnub ntawm ovulation. Ntawm kev mus ncig tsis tu ncua, nws yuav siv sijhawm nyob rau hnub 14 ntawm lub voj voog, tab sis qee tus poj niam muaj lub voj voog luv dua, lwm tus ntev dua, lossis txawm tias mus tsis xwm yeem. Nws yog vim li no nyuaj kom paub thaum ovulation tshwm sim. Tom qab ntawd koj tuaj yeem siv cov txheej txheem sib txawv kom paub koj hnub ovulation: qhov ntsuas kub, qhov kev soj ntsuam ntawm hnoos qeev ntawm ncauj tsev menyuam thiab kev ntsuas ovulation - cov no yog txoj hauv kev uas ntseeg tau tshaj plaws.

Thaum paub hnub ntawm ovulation paub, nws muaj peev xwm txiav txim siab nws lub qhov rai fertility uas yuav suav nrog ntawm ib sab tes lub neej ntawm spermatozoa, ntawm qhov tod tes ntawm ntawm fertilized oocyte. Kom paub:

• ib zaug tso tawm thaum lub sijhawm ovulation, oocyte tsuas yog fertilizable rau 12 txog 24 teev;
• phev tseem tuaj yeem ua chiv hauv poj niam qhov chaw mos rau 3 txog 5 hnub.

Cov kws tshaj lij pom zoo kom muaj kev sib deev tsawg kawg txhua txhua hnub nyob ib ncig ntawm ovulation, suav nrog ua ntej. Txawm li cas los xij, paub tias lub sijhawm zoo no tsis tuaj yeem lav 100% qhov tshwm sim ntawm cev xeeb tub.

Nws tsis tuaj yeem teb lo lus nug no raws li kev muaj menyuam yaus nyob ntawm ntau qhov ntsuas: qhov ua tau zoo ntawm ovulation, lub tsev menyuam, qhov ncauj ntawm ncauj tsev menyuam, mob ntawm cov hlab, qhov phev zoo. Txawm li cas los xij, ntau yam tuaj yeem cuam tshuam cov txiaj ntsig sib txawv no: hnub nyoog, kev noj zaub mov, kev nyuab siab, haus luam yeeb, haus cawv, rog dhau lossis ua kom yuag, ua haujlwm txuas ntxiv, thiab lwm yam.

Txawm li cas los xij peb tuaj yeem muab, qhia qhov tseeb, qhov nruab nrab. Yog li raws li cov ntaub ntawv kawg los ntawm INED (1), tawm ntawm 100 khub niam txiv nruab nrab kev muaj menyuam xav tau menyuam, tsuas yog 25% yuav ua tiav cev xeeb tub los ntawm thawj lub hlis. Tom qab 12 lub hlis, 97% yuav ua tiav. Qhov nruab nrab, khub niam txiv siv sijhawm 7 lub hlis los cev xeeb tub.

Ib qho tseem ceeb yuav tsum tau coj mus rau hauv tus account yog qhov ntau zaus ntawm kev sib deev: ntau ntau, ntau qhov muaj feem ntawm kev xeeb tub nce ntxiv. Yog li dhau ib xyoos ntawm ib xyoos, nws tau suav tias:

• los ntawm kev hlub ib zaug ib lub lim tiam, qhov muaj feem yuav xeeb tub yog 17%;
• ob zaug hauv ib lub lis piam, lawv yog 32%;
• peb zaug hauv ib lub lis piam: 46%;
• ntau tshaj plaub zaug hauv ib lub lis piam: 83%. (2)

Txawm li cas los xij, cov nuj nqis no yuav tsum tau hloov kho raws li qhov tseem ceeb hauv kev muaj menyuam: hnub nyoog poj niam, vim poj niam cev xeeb tub poob qis tom qab 35 xyoo. Yog li, qhov muaj feem yuav muaj menyuam yog:

• 25% ib hlis twg ntawm 25 xyoos;
• 12% ib hlis twg ntawm 35 xyoos;
• 6% ib hlis twg ntawm 40 xyoos;
• yuav luag xoom dhau lub hnub nyoog 45 (3).

Thaum ob peb pib ntawm "kev sim menyuam yaus", qhov pib ntawm kev coj khaub ncaws tuaj yeem zoo li ua tsis tau zoo txhua lub hlis. Txawm li cas los xij, nws yuav tsum nco ntsoov tias txawm tias yog teem sijhawm sib deev ntawm ovulation, muaj feem yuav xeeb tub tsis yog 100% hauv txhua lub hlis, yam tsis muaj qhov no yog qhov cim ntawm teeb meem kev muaj menyuam.

Tsis tas li cov kws tshaj lij qhia kom tsis txhob "xav ntau txog nws", txawm tias qhov no nyuaj thaum qhov kev xav tau rau menyuam yaus loj tuaj thiab muaj zog dua.

Cov kws kho mob hais txog kev tsis muaj menyuam thaum, thaum tsis muaj kev tiv thaiv menyuam yaus thiab nrog kev sib deev tas li (tsawg kawg 2 txog 3 zaug hauv ib lub lis piam), ob peb tus menyuam tsis xeeb tub tom qab 12 txog 18 lub hlis (yog tias tus poj niam muaj hnub nyoog qis dua 35-36). Tom qab 37-38 xyoo, nws raug nquahu los tsim qhov kev ntsuas thawj zaug tom qab lub sijhawm tos ntawm 6 txog 9 lub hlis, vim tias kev muaj menyuam yaus poob qis nyob rau lub hnub nyoog no, thiab nrog nws cov txiaj ntsig ntawm AMP cov txuj ci.