正常的雞蛋一般呈橢圓形，表麵光滑
、飽滿，同一日齡的雞所產的雞蛋大小適中，均勻一致。所謂畸形蛋就是不飽滿、形狀不規則的雞蛋，包括球形蛋、扁形蛋、條形蛋、尖形蛋、皺殼蛋、薄殼蛋
、無殼蛋
、糙殼蛋等。這些畸形蛋是怎樣形成的呢？

疾病因素 雞感染了傳染性支氣管炎、新城疫、減蛋綜合征等疾病均可引起輸卵管內表麵細胞結構的損害，導致水狀蛋白的產生和蛋殼出現問題。新城疫
、傳(chuan)染(ran)性(xing)支(zhi)氣(qi)管(guan)炎(yan)病(bing)毒(du)，侵(qin)害(hai)輸(shu)卵(luan)管(guan)膨(peng)大(da)部(bu)，使(shi)膨(peng)大(da)部(bu)表(biao)麵(mian)細(xi)胞(bao)結(jie)構(gou)受(shou)到(dao)損(sun)害(hai)，蛋(dan)白(bai)的(de)分(fen)泌(mi)受(shou)到(dao)影(ying)響(xiang)，濃(nong)蛋(dan)白(bai)與(yu)稀(xi)蛋(dan)白(bai)界(jie)限(xian)消(xiao)失(shi)，蛋(dan)清(qing)變(bian)稀(xi)，正(zheng)常(chang)的(de)蛋(dan)白(bai)“膨大部”消xiao失shi了le，導dao致zhi蛋dan清qing變bian癟bie。蛋dan清qing變bian癟bie後hou
，在zai輸shu卵luan管guan狹xia部bu內nei產chan生sheng的de覆fu蓋gai在zai蛋dan清qing上shang的de蛋dan殼ke膜mo也ye變bian得de皺zhou縮suo，並bing且qie覆fu蓋gai在zai蛋dan殼ke膜mo外wai層ceng的de蛋dan殼ke也ye出chu現xian皺zhou縮suo，這zhe樣yang就jiu形xing成cheng了le皺zhou殼ke蛋dan。如ru峽xia部bu過guo細xi
，則ze形xing成cheng細xi長chang形xing的de雞ji蛋dan。輸shu卵luan管guan收shou縮suo反fan常chang時shi


，就jiu會hui形xing成cheng兩liang端duan尖jian形xing的de、扁形的雞蛋。病毒侵害輸卵管子宮部時，導致子宮部蛋殼腺的細胞損傷，容易產薄殼蛋、沙殼蛋、軟殼蛋。

應激因素 高密度應激
、熱應激、噪音、強光驚嚇等應激可導致母雞繁殖周期變化，正常的繁殖周期是每26小時產1meijidan。yingjizaochengfanzhizhouqiwenluan。yingjicujinjitineishifangpizhileiguchunjisu，zhezhongjisukecongjidanshengchanzhongzhuanchubufenyingyangwuzhi，gaibianjisupingheng，jianshaocaishiliangyijicujinjirouhegugefenjie。huakedanhebaiezhuangdankejiushiyouzuihouyikegaiyanchenjiguoduozaochengde。zhexieduoyudegaihuazuoyongshikeshangmoxingchengzhihoushifangdelinsuanyanchenjiercheng。reyingjiqingkuangxiadedanjiqunyichanbokedan，zhuyaoyinqichuandaozhisuanjianpinghengwenluanzaochengde。

營養因素 如果飼料中投喂的鈣、磷和維生素D不足，則會形成沙殼蛋、ruankedan。lingwaiyeyaozhuyisiliaozhongweiliangyuansudetianjialiang，tongduilaiansuandejiaolianhenzhongyao
，erlaiansuandejiaolianshiweichishengwumozhengchangheruanguxingchengdezhongyaowuzhi。yincitongdequefajianghuijianshaojiaoyuandanbaihedanxingdanbaidejiaolian，congerdaozhidankemoquesun，yingxiangzaidankemoshangdegaihuazuoyong，rongyixingchengzhoupidanhejixingdan。guoliangdemeirongyiyingxianggaidezhengchangdaixie，daozhidankebianbohegugeruanhua。mouxieyaowukeyidaozhidankeyansefashengbianhua，ruqianglimeisukeyishibaikejidandankedeyansebianhuanghuobianlv。huanganleiyaojikedaozhidanjidechandanliangxunsuxiajiang，jidanneibuhewaibuzhiliangjiangdiyijihekejidandanketuise。nikabaqinhuidaozhidanhuangbandechanshenghehekejidandanketuise。youjilvhuawushachongjikedaozhiboke、白堊狀蛋殼雞蛋的產生

，以及褐殼雞蛋蛋殼褪色。

畸形蛋給種雞、蛋雞生產造成極大的損失，找到畸形蛋形成的原因，在生產中進行預防疾病，減少各種應激，飼喂全價飼料
，可控製畸形蛋的產生。