Los ntawm 4 lub lis piam ntawm cev xeeb tub, nyob rau hauv cov nyhuv ntawm cev xeeb tub cov tshuaj hormones, lub ncauj tsev menyuam mucus coagulates nyob rau theem ntawm lub ncauj tsev menyuam los tsim lub mucous plug. Cov hnoos qeev no kaw lub ncauj tsev menyuam thiab ua kom nws nruj thaum cev xeeb tub, yog li tiv thaiv tus menyuam hauv plab los ntawm kev kis kab mob. Qhov mucous plug yog qhov tseeb ua los ntawm mucins (loj glycoproteins) uas nres cov kab mob sib kis thiab thaiv cov kab mob kis. Nws kuj muaj cov cuab yeej tiv thaiv kab mob uas ua rau muaj cov kab mob inflammatory hauv lub xub ntiag ntawm cov kab mob. Cov kev tshawb fawb pom tau hais tias lub qhov ntsaws ntsaws uas ua haujlwm tsis zoo hauv nws txoj kev ua haujlwm tsis zoo tuaj yeem ua rau muaj kev pheej hmoo ntawm kev yug menyuam ntxov (1).

Nyob rau hauv cov nyhuv ntawm contractions thaum kawg ntawm cev xeeb tub (Braxton-Hicks contractions) ces cov neeg ua hauj lwm, lub ncauj tsev menyuam matures. Raws li lub ncauj tsev menyuam txav mus, cov kua nplaum yuav raug tso tawm thiab raug tshem tawm hauv daim ntawv nplaum, gelatinous, translucent, yellowish lossis brownish poob. Qee lub sij hawm lawv muaj xim liab los yog muaj cov ntshav me me: cov ntshav no sib raug rau cov hlab ntsha me me thaum cov mucous plug detaches.

Kev poob ntawm cov mucous plug tuaj yeem ua tiav maj mam, zoo li nws yog crumbling, yog li ntawd tus niam-rau-tus yuav tsis nco ntsoov nws, lossis tag nrho ib zaug. Nws tuaj yeem tshwm sim ob peb hnub ua ntej yug menyuam, tib hnub, lossis txawm tias thaum yug menyuam. Nws yuav tsum tau muab sau tseg tias raws li kev xeeb tub, lub ncauj tsev menyuam yog elastic dua, lub mucous plug yog tej zaum ntau ntau thiab yog li ntawd yooj yim rau pom.

Kev poob ntawm lub ntsaws tsis tas yuav txhawj xeeb: nws yog qhov qub thiab qhia tau tias lub ncauj tsev menyuam ua haujlwm. Txawm li cas los xij, qhov poob ntawm mucous plug ib leeg tsis muab lub teeb liab tawm hauv tsev kho mob maternity. Qhov no yog ib qho kev txhawb siab tias kev ua haujlwm yuav los sai sai, tab sis nws yuav tsis tas pib hauv ib teev lossis hnub.

Ntawm qhov tod tes, txhua qhov chaw mos los ntshav ntawm cov ntshav liab lossis cov hlab ntsha tsaus yuav tsum tau hais kom muaj kev sab laj (2).

Txhawm rau tshaj tawm qhov tseeb qhov pib ntawm kev ua haujlwm, lwm cov cim qhia yuav tsum nrog rau qhov poob ntawm cov mucous plug:

• tsis tu ncua, mob, rhiab heev contractions ntawm kev siv zog. Yog tias qhov no yog thawj tus menyuam mos, nws raug nquahu kom mus rau hauv tsev kho mob poj niam cev xeeb tub thaum cov qog nqaij hlav rov qab txhua 10 feeb. Rau tus menyuam thib ob lossis thib peb, nws raug nquahu kom mus rau tom tsev kho mob maternity sai li sai tau thaum lawv ua tsis tu ncua (3).
• lub rupture ntawm lub hnab dej uas manifests nws tus kheej los ntawm kev khiav ntawm ib tug pob tshab thiab tsis muaj ntxhiab kua, piv rau dej. Qhov kev poob no tuaj yeem ncaj qha lossis txuas ntxiv (yuav muaj qhov tawg hauv lub hnab ntim dej). Nyob rau hauv ob qho tib si, lub taub hau mus rau lub tsev kho mob maternity tsis ncua vim tus me nyuam tsis muaj kev tiv thaiv kab mob lawm.