Al'umman yau suna jujjuya shekarun haihuwa na farko daga shekara zuwa shekara. A matakin ilimin halittu, duk da haka, akwai gaskiyar da ba ta bambanta: haihuwa tana raguwa da shekaru. Matsakaicin tsakanin shekaru 25 zuwa 29, yana raguwa a hankali kuma a hankali tsakanin shekaru 35 zuwa 38, kuma cikin sauri bayan wannan ranar ƙarshe. Don haka a shekara 30, macen da ke son samun haihuwa tana da damar samun nasara kashi 75% bayan shekara guda, kashi 66% a 35 da 44% a 40. Haihuwar namiji kuma tana raguwa da shekaru.

Kowane ciki yana farawa tare da gamuwa tsakanin oocyte da maniyyi. Duk da haka, wannan oocyte za a iya yin takin ne kawai a cikin awanni 24 na ovulation. Don haɓaka damar samun ciki, saboda haka yana da mahimmanci a gano wannan “lokacin haihuwa”.

A kan hawan keke na yau da kullun, ovulation yana kan ranar 14th na sake zagayowar, amma akwai manyan bambance -bambance daga mace zuwa mace kuma daga sake zagayowar zuwa zagayowar. Don manufar ɗaukar ciki, saboda haka yana da kyau a gano ranar yin ovulation tare da ɗayan dabarun sa: lanƙwasa zafin jiki, lura da ƙwaryar mahaifa, gwajin ovulation.

Masana sun ba da shawarar yin saduwa aƙalla kowace rana a daidai wannan lokacin, gami da kafin, saboda maniyyi na iya ci gaba da takin a cikin al'aurar mata na kwanaki 3 zuwa 5. Don haka za su sami lokacin komawa cikin bututu don ƙarshe su sadu da oocyte da aka saki yayin ovulation. Yi hankali, duk da haka: wannan kyakkyawan lokacin baya bada garantin faruwar ciki. A kowane sake zagayowar, yuwuwar samun juna biyu bayan yin jima'i a mahimmin lokaci shine 15 zuwa 20% (2) kawai.

A hanyar rayuwarmu da muhallinmu, abubuwa da yawa suna shafar haihuwa. An tara su a cikin “tasirin hadaddiyar giyar”, a zahiri suna iya rage damar samun juna biyu. Kamar yadda zai yiwu, saboda haka yana da mahimmanci a kawar da waɗannan abubuwa daban -daban, musamman tunda yawancin su suna cutar da ɗan tayi da zarar ciki ya shiga.

• taba na iya rage yawan haihuwa ga mata fiye da 10 zuwa 40% a kowane zagayowar (3). A cikin maza, zai canza lamba da motsi na maniyyi.
• barasa na iya haifar da rashin daidaituwa, raunin da ba na ovulatory ba kuma yana ƙara haɗarin ɓarna, yayin da a cikin maza an yi imanin yana lalata maniyyi.
• danniya yana shafar libido kuma yana haifar da ɓoyayyen hormones daban -daban waɗanda zasu iya yin tasiri akan haihuwa. A lokacin matsanancin damuwa, glandon pituitary yana ɓoye musamman prolactin, hormone wanda, a matakan da yawa, yana haɗarin lalata ovulation a cikin mata da maza, yana haifar da cututtukan libido, rashin ƙarfi da oligospermia (4). Ayyuka kamar tunani suna taimakawa wajen yaƙar damuwa.
• yawan maganin kafeyin zai iya ƙara haɗarin ɓarna, amma karatu yana ci gaba da sabani akan batun. Dangane da taka tsantsan, duk da haka, yana da kyau a iyakance yawan shan kofi zuwa kofuna biyu a rana.

Yawancin abubuwan muhalli da halaye na rayuwa ana tsammanin suna shafar haihuwa: magungunan kashe qwari, karafa masu nauyi, raƙuman ruwa, wasanni mai ƙarfi, da sauransu.

Abinci kuma yana da rawar da zai taka wajen haihuwa. Haka kuma, an tabbatar da cewa yin kiba ko, akasin haka, mai kauri na iya hana haihuwa.

Dance Babban Littafin Haihuwa, Dokta Laurence Lévy-Dutel, likitan mata da likitan abinci mai gina jiki, ta ba da shawara da a kula da batutuwa daban-daban don kiyaye haihuwa:

• son abinci tare da ƙarancin glycemic index (GI), kamar yadda maimaita hyperinsulinemia zai tsoma baki tare da ovulation
• rage sunadarin dabbobi a madadin furotin kayan lambu
• ƙara yawan abincin fiber
• kalli yadda ake cin ƙarfe
• rage yawan kitse mai kitse, wanda zai iya cutar da haihuwa
• shan duk kayan kiwo sau ɗaya ko sau biyu a rana

Dangane da binciken Amurkawa na baya -bayan nan (5), yawan shan kari na yau da kullun yayin ɗaukar ciki na iya rage haɗarin ɓarna da kashi 55%. Koyaya, yi hankali tare da ba da umarnin kai: fiye da kima, wasu bitamin na iya zama cutarwa. Don haka yana da kyau a nemi shawarar kwararru.

Babu wani binciken da ya sami damar nuna fa'idar wannan ko wancan matsayin. A taƙaice, duk da haka, muna ba da shawara don fifita matsayi inda tsakiyar nauyi ke wasa don fifita hanyar maniyyi zuwa cikin oocyte, kamar matsayin Mishan. Hakanan, wasu kwararru suna ba da shawarar kada a tashi nan da nan bayan saduwa, ko ma kiyaye ƙashin ƙugu da matashin kai.

Hakanan batu ne mai rikitarwa kuma yana da wahalar tantancewa a kimiyance, amma yana iya kasancewa inzali na mace yana da aikin halittu. Dangane da ka'idar "tsotse" (tsotsa), ƙuƙwalwar mahaifa ta haifar da inzali yana haifar da sabon abu na burin maniyyi ta cikin mahaifa.