1.性成熟時期

麝鼠一般于(yu)6月齡性成熟，可進行交配(pei)。

2.性表現

麝鼠(shu)(shu)(shu)(shu)(shu)是季節性(xing)多次(ci)發(fa)情繁(fan)殖(zhi)的多胎次(ci)動(dong)物，公(gong)母(mu)(mu)鼠(shu)(shu)(shu)(shu)(shu)在(zai)性(xing)表現(xian)(xian)(xian)(xian)上有些差異。公(gong)鼠(shu)(shu)(shu)(shu)(shu)的性(xing)表現(xian)(xian)(xian)(xian)較為(wei)強(qiang)烈的時期在(zai)3～10月(yue)(yue)。最(zui)寒冷的冬日剛(gang)過，公(gong)鼠(shu)(shu)(shu)(shu)(shu)即有強(qiang)烈的性(xing)欲(yu)表現(xian)(xian)(xian)(xian)，表現(xian)(xian)(xian)(xian)為(wei)焦躁(zao)不安，異常興(xing)奮(fen)，睪(gao)丸明顯下墜，龜頭(tou)有時露出，香(xiang)腺(xian)(xian)開(kai)始分泌麝鼠(shu)(shu)(shu)(shu)(shu)香(xiang)，散發(fa)出濃(nong)烈香(xiang)味，引誘母(mu)(mu)鼠(shu)(shu)(shu)(shu)(shu)。進入11月(yue)(yue)份，公(gong)鼠(shu)(shu)(shu)(shu)(shu)性(xing)欲(yu)減弱，性(xing)表現(xian)(xian)(xian)(xian)不明顯，香(xiang)腺(xian)(xian)停止分泌，睪(gao)丸也縮回腹腔內。一般地(di)講，母(mu)(mu)鼠(shu)(shu)(shu)(shu)(shu)發(fa)情高潮(即動(dong)情期)時，公(gong)鼠(shu)(shu)(shu)(shu)(shu)的泌香(xiang)量也最(zui)大。母(mu)(mu)鼠(shu)(shu)(shu)(shu)(shu)的性(xing)欲(yu)表現(xian)(xian)(xian)(xian)較晚，一般在(zai)4月(yue)(yue)上中旬才開(kai)始，表現(xian)(xian)(xian)(xian)為(wei)鳴(ming)叫、不安、興(xing)奮(fen)、尿頻、外(wai)陰變化等(deng)(deng)等(deng)(deng)。母(mu)(mu)鼠(shu)(shu)(shu)(shu)(shu)發(fa)情周期一般為(wei)15～22天。母(mu)(mu)鼠(shu)(shu)(shu)(shu)(shu)發(fa)情周期分為(wei)4個(ge)時期：麝鼠(shu)(shu)(shu)(shu)(shu)

（1）休(xiu)情期13～20天，母鼠情緒穩定，拒絕(jue)公鼠尾隨，外陰緊閉而(er)干燥(zao)，外陰部皮膚收縮呈黃(huang)白(bai)色。

(2) 動情(qing)前期(qi)1～2天(tian)，表(biao)現出興(xing)奮不安，時(shi)有鳴(ming)叫，十(shi)分注意公鼠的一舉一動，但拒絕公鼠爬(pa)跨。此期(qi)母(mu)鼠外(wai)陰(yin)部開始松弛，并出現濕潤，產生輕度(du)腫脹，外(wai)陰(yin)粘膜呈(cheng)粉紅色。

(3) 動情(qing)期時間延續2～3天(tian)，此期母鼠興奮(fen)程度(du)加劇(ju)，鳴叫次數增多(duo)，頻率加快(kuai)。食欲明(ming)顯減退，外陰部(bu)充血膨大(da)，陰門口張開呈(cheng)紫紅(hong)色并有(you)大(da)量粘液流出。發(fa)情(qing)的母鼠在水(shui)中喜歡追逐公鼠，上陸后(hou)迅即做出彎腰弓背姿勢，接(jie)受公鼠的爬(pa)跨交配。

(4) 動(dong)情后期1～2天(tian)，由(you)(you)高(gao)度興奮狀態(tai)逐漸趨于(yu)正常(chang)，食(shi)欲(yu)增加。停止鳴叫，拒(ju)絕公鼠爬跨。外陰部的膨大消退，陰門(men)開口(kou)縮(suo)小至關閉，顏色(se)由(you)(you)紫轉淡，呈正常(chang)淡紅色(se)，陰道口(kou)分泌物也大大減少(shao)。