Zifukwa za kubadwa kwa mapasa

Zaka mazana angapo zapitazo, kubadwa kwa ana awiri kapena kuposerapo kuchokera kwa mkazi kunadziwika ngati chinthu chachilendo, koma lero madotolo adapeza tsatanetsatane wazinthu zambiri.

Zifukwa za kubadwa kwa mapasa kungakhale motere:

1. Ukhondo, popeza ana 10 peresenti amapezeka m'mabanja omwe amapasa anabadwa kale. Pankhaniyi, chirichonse chingathe kufotokozedwa ndi mabadwa, monga momwe mayi amapangira mahomoni ochuluka, omwe amachititsa kusasitsa kwa mazira angapo kamodzi, motero kumapangitsa kukhala ndi pakati pa ana angapo nthawi yomweyo.
2. Kuthetsedwa kwa njira za kulera zamlomo zomwe zimapangitsa kuti ovulation ndi kusasitsa mwezi wa maselo azimayi nthawi zambiri zimatsogolera maselo angapo nthawi imodzi, makamaka mwezi woyamba, pamene thupi limayesa "kugwira".
3. Chithandizo cha infertility ndi mankhwala omwe amachititsa ovulation, amapereka zotsatira zofanana.
4. Pogwiritsira ntchito mu vitro feteleza, amai nthawi zambiri "amafesedwa" mazira angapo pokhapokha kuti awonjezere mwayi wa mimba, ndipo zimachitika kuti mazira onsewa amayamba kukula bwino m'chiberekero.
5. Zochitika zapadera za amayi, makamaka, kugwirana kwa chiberekero, zingayambitse kutenga mapasa.
6. M'badwo wa mayi, monga wamkulu, ali ndi mwayi waukulu wopereka mapasa.
7. Kubwereza kobwerezabwereza, monga momwe mimba iliyonse yatsopano imakhudzira kubadwa kwa mapasa. Ngati mayi atulutsa kale ana awiri, ndiye kuti izi zikhoza kuwirikiza kawiri.

Kuonjezera apo, kafukufuku amasonyeza kuti pa nthawi ya nkhondo ndi zovuta za anthu, nthawi zambiri kubadwa kwa ana otere kumakula. Mfundo imeneyi siipeza tsatanetsatane, ndipo asayansi akhoza kuganiza kuti chilengedwe chokhalira kusunga mtundu wa anthu chimagwira ntchito motere.

Zingathe kuzindikirika kuti zifukwa zonsezi zapangitsa kuti zikhale zotheka kufotokoza chifukwa mapasa amaonekera - mosiyana ndi ana, nthawi zina ngakhale amitundu yosiyanasiyana. Pa nthawi imodzimodziyo, sayansi silingathe kufotokoza chifukwa chake ana omwe ali ofanana kwambiri amabadwa (mapasa oona).

Kodi mapasa ndi ati?

Choncho, ndi chiwonongeko cha dziko lonse lapansi, ana samangowoneka ngati madontho awiri a madzi. Gemini ikhoza kukhala yozizira komanso monozygotic, yomwe imasiyana kuchokera kwa wina ndi mzake ndi momwe zimakhalire ndi pakati.

Ana opatsirana pogonana amabadwa pamene mazira angapo amamera panthawi imodzimodzi ndi spermatozoa, ndipo motero amasiyana kwambiri ndipo angakhale ndi amuna osiyana.

Zomwe zimayambitsa mawonekedwe a monozygotic (ofanana) ndi awa: umuna umodzi umakhala umuna umodzi, koma patapita kanthawi (kuyambira 2 mpaka 12 masiku) zygote anagawidwa kukhala awiri (ndipo nthawi zina kwambiri) mazira. Ndicho chifukwa chake ana awa nthawi zonse amakhala ofanana, mazenera, kunja, ndi kugonana. Madokotala anaona chitsanzo chochititsa chidwi, zomwe ziri mukuti kale kusiyana kwa zygote kumayambira, zochepa zomwezo ndi ana odnoyaytsevyh.

Mapasa a Siamese ndi zifukwa zawo

Chifukwa cha kubadwa kwa mapasa a Siamese ndi awa: Pamene dzira limodzi limapangidwa ndi spermatozoon imodzi ndipo kenako, mochedwa (pambuyo pa tsiku la 12 pambuyo pa umuna) lagawidwa mu magawo awiri, zimachitika kuti mazira alibe nthawi yopatukana, atayambitsa chitukuko cha munthu aliyense. Pachifukwa ichi, amakhala ogwirizana wina ndi mnzake ndi gawo limodzi la thupi (izi zingakhale mutu wamba, mimba, miyendo, nkhope).