一、公豚的辜丸

公豚的兩個辜丸位于骨盆腔的兩側，形狀像鳥蛋。辜丸上有豐富的血管，辜丸產生的精子進入附辜，緊接附辜的管子是輸精管，輸精管開口于尿道。此外，公豚的精囊分為左右兩個，形狀像蟲子一樣，它連接輸精管。
辜丸(wan)(wan)是(shi)公豚(tun)生(sheng)殖(zhi)系統的(de)重要(yao)組成(cheng)部分之一，其(qi)主(zhu)要(yao)功能是(shi)產生(sheng)精子(zi)和分泌雄性激素。從胎兒期(qi)起，一生(sheng)中(zhong)辜丸(wan)(wan)的(de)位置經常(chang)變(bian)化。胎兒期(qi)和初(chu)生(sheng)幼豚(tun)辜丸(wan)(wan)位于(yu)腹腔，附著于(yu)腹壁。隨著年(nian)齡的(de)增長，辜丸(wan)(wan)的(de)位置下降(jiang)，1月(yue)齡辜丸(wan)(wan)下降(jiang)至(zhi)腹股管內，此時辜丸(wan)(wan)尚小，從外部不(bu)易(yi)摸(mo)出，表面也未形成(cheng)陰(yin)囊(nang)。大約1 .5月(yue)齡以上(shang)(shang)的(de)公豚(tun)己有明顯的(de)陰(yin)囊(nang)。辜丸(wan)(wan)降(jiang)入(ru)陰(yin)囊(nang)的(de)時間一般(ban)在1 .5月(yue)齡，成(cheng)年(nian)公豚(tun)的(de)辜丸(wan)(wan)基(ji)本上(shang)(shang)在陰(yin)囊(nang)內。

二、母豚的卵巢和子宮類型

母豚的卵巢位于腎臟的下方，卵巢呈圓形，卵巢下接輸卵管通向子宮。
一(yi)般家畜如馬、牛、豬等，母畜的(de)子(zi)(zi)(zi)宮(gong)(gong)(gong)(gong)(gong)明(ming)顯地分為子(zi)(zi)(zi)宮(gong)(gong)(gong)(gong)(gong)角(jiao)(jiao)和子(zi)(zi)(zi)宮(gong)(gong)(gong)(gong)(gong)體，兩側子(zi)(zi)(zi)宮(gong)(gong)(gong)(gong)(gong)角(jiao)(jiao)在子(zi)(zi)(zi)宮(gong)(gong)(gong)(gong)(gong)體處會合成一(yi)體，并由一(yi)個子(zi)(zi)(zi)宮(gong)(gong)(gong)(gong)(gong)頸開口于(yu)陰(yin)道。而母黑豚的(de)子(zi)(zi)(zi)宮(gong)(gong)(gong)(gong)(gong)由左右兩個子(zi)(zi)(zi)宮(gong)(gong)(gong)(gong)(gong)角(jiao)(jiao)和子(zi)(zi)(zi)宮(gong)(gong)(gong)(gong)(gong)體構(gou)成。開口于(yu)陰(yin)道，這種(zhong)情(qing)況，在哺乳動物子(zi)(zi)(zi)宮(gong)(gong)(gong)(gong)(gong)分類上屬于(yu)雙(shuang)子(zi)(zi)(zi)宮(gong)(gong)(gong)(gong)(gong)類型，是一(yi)種(zhong)最(zui)原始的(de)類型。因此，不會發生像其(qi)他家畜那(nei)樣，受精卵(luan)可(ke)以從一(yi)個子(zi)(zi)(zi)宮(gong)(gong)(gong)(gong)(gong)角(jiao)(jiao)向另一(yi)個子(zi)(zi)(zi)宮(gong)(gong)(gong)(gong)(gong)角(jiao)(jiao)移行的(de)情(qing)況。

三、母豚的排卵

一(yi)般母豚在達到(dao)(dao)性成(cheng)熟以后，每隔一(yi)定的時(shi)(shi)間即(ji)發(fa)(fa)情一(yi)次，發(fa)(fa)情過程也(ye)伴隨(sui)著排卵(luan)(luan)，這種排卵(luan)(luan)不(bu)需外(wai)界刺激(ji)，自發(fa)(fa)進行，稱自發(fa)(fa)性排卵(luan)(luan)。母豚的排卵(luan)(luan)一(yi)般情況下也(ye)是自發(fa)(fa)性排卵(luan)(luan)，在達到(dao)(dao)性成(cheng)熟以后，每隔15-16夭的時(shi)(shi)間就會出現(xian)發(fa)(fa)情征狀，這期間就伴隨(sui)著排卵(luan)(luan)，是投(tou)放(fang)公豚的最佳時(shi)(shi)機。