Inyanga yesibini yokukhulelwa iqala ngeveki yesihlanu. Ngeli xesha ubude bombindi sele sele u-7.5 cm. Ngenyanga yesibini yokuphuhliswa kwe-intrauterine, inkqubo ye-nervous central, ingqondo, umgudu, kunye neengcambu zesondo zomntwana ezizayo. Ngeli xesha, isibindi nesifo se-thyroid siphuhlisa. Ngako oko, kubalulekile kakade ngeli xesha lokukhulelwa ukuhlawula ingqalelo ngokukhethekileyo ekudleni. Faka phakathi ukutya okutya okune-iodine, eyimfuneko yokwakheka kwe-thyroid gland.
Kwinyanga yesibini yokukhulelwa, intloko ye-fetal isondele kakhulu kwi-trunk, ifakwe kwisifuba. Sekudlulileyo kwiintsuku ezingama-31-32 zikhona izicwangciso zezandla kunye neenyawo ezifana neengcongolo. Kwiveki yesithandathu, ukuqala kwelihlo elizayo lenziwe. Iindlebe zivela entloko yembungu. Ukongezelela, isakhiwo somzimba senziwa kwiveki yesithandathu, intliziyo kunye nomsebenzi wendlela yokujikeleza.
Ngexesha leveki yesixhenxe yokuphuhliswa kwe-intrauterine, iinkqubo ze-organogenesis zenziwa ngokuphindaphindiweyo. Amanyathelo athuthukisiwe aphuculwe kwiiveki ezedlulileyo. Kwimizila yegazi yombungu, enye ikhululwe, ephakathi kwembungu kunye ne-placenta. Emva koko, uguqulwa ube yintanki ephakathi komama nomntwana - i-placenta. Kwakhona ngelo xesha, iminwe ibunjwa kwiimbambo, ezisezona zifutshane kwaye zininzi. Ubude bombindi ekupheleni kweveki yesixhenxe sele kusele 12-15 cm. Njengoko ubona, kwiiveki ezimbini ziphantse ziphindwe kabini.
Ukususela ngeveki yesibhozo, umbungu uqala ukukhula ngokukhawuleza, amaninzi amaninzi asele awakhiwe, ngoko ukukhula kwabo kunye nokuphuhliswa okuqhubekayo kwenzeka. Umntwana ozayo usele ubuso: umlomo, impumlo, indlebe. Ukongezelela, kukho umehluko ophawulwe kwisakhiwo sezitho zomzimba. Intloko yesibindi iphantse ilingana nobude be-trunk. Ukususela ngeli xesha i-embryo iba isiqhamo. Ubude bayo bu malunga ne-20-30 mm, kunye nobukhulu - 13 amagremu.
Kuyathakazelisa ukwazi ukuba kwinyanga yesibini yokuphuhliswa kwe-intrauterine yonke inkqubo yokuxhamla amathambo ebusana ikhula, i-trunk yenziwa ize ikhule. Iimpawu zeentloko zibonakala emehlweni omntwana. Uyakwazi ukuvula umlomo wakhe, kunye nokuhambisa iminwe yakhe. Imilenze yesifo somntwana. Ngeli thuba, intumbu enkulu iqala ukwenza umsebenzi wayo wesivumelwano.
Yintoni echaphazela ngubani oya kubakho, inkwenkwe okanye intombazana
Kwaye yonke loo nto kwi-genetics ... Iiseli zesini zesintu ziqulethe ii-chromosomes ezingama-23, ngokuchaseneyo nazo zonke ezinye iiseli, ezinama-chromosomes angama-46. Ama-Chromosomes ukusuka ngowokuqala ukuya kumashumi mabini anesibini kwimilo efanayo. Lawa ma-chromosomes somatic. Kodwa i-chromosomes yesibini ye-23 ifanayo kuphela kwabesetyhini. Le yile chromosome XX. Kwamadoda, nangona kunjalo, ii-chromosomes zale mibini zihlukile, ngoko zikhethwe njenge-XY i-chromosomes. Ngoko ke, ukuba iqanda lifake i-X-spermatozoon, intombazana "iyafika", kwaye ukuba i-Y-sperm iyamfaka, ithetha ukulinda le nkwenkwana.
Imiva yomfazi okhulelwe
Ndicinga ukuba abaninzi abafazi, ukuqala kwinyanga yesibini yokukhulelwa, "batyiweyo" kwihlabathi leentshukumo ezintsha. Awuzange nje unqume ukuya esikhathini, kodwa kunokuba ne-toxicosis yokukhulelwa, kubonakaliswe ngongcongconi nokuhlanza, njengendlela yokuphendula ngokutya kunye novumba. Intloko, ukulala, ukuzondla ngezikhathi ezithile, ubunzima obuthathaka. Ekupheleni kwenyanga yesibili yokukhulelwa, umfazi unokuvakalelwa nokuba unqabileyo lweengubo ezisezinqeni zakhe. Ngeli thuba, kunokukho izilingo kwizinto zokutya, ukulangazelela okunomsoco, utyesi okanye umnandi. Ndizikhumbula mna, indlela endifuna ngayo inyama, kwaye ngokuqhelekileyo nditya.
Utshintsho olutsha olunjalo emzimbeni luyisiphumo sokulungelelaniswa "kwimeko elitsha". Olunye utshintsho lweemeko luya kubonakala, njengokuthi: ukucaphuka, ukucaphuka, iimvakalelo zokuxhalabisa, ukuguquka kwemizwelo.
Inyanga yesibini yokukhulelwa yinto yohlobo lokutshintsha, xa ibhinqa lifanele liqwalasele indlela yakhe yobomi, isondlo, urhulumente osebenzayo, njl. Ukuphuhliswa kwentuthuko yefubus ngenyanga yesibini yokukhulelwa, kuyimfuneko ukuba ingabandakanyi umphumo wezinto ezinobungozi ezahlukeneyo. Eyona ndlela ikhethekileyo kukuba kuthathe iiveki ezimbalwa ukuphumla kwaye uthathe uhambo olutsha. Ukuba awukabhaliswa kwi-intetho yabesifazane, ngoku yisikhathi sokuya kwintlobo yesifo somzimba. Uya kunika iingcomo ezifanelekileyo malunga nesondlo, misela zonke iimvavanyo eziyimfuneko uze uphendule imibuzo enomdla kuwe.