Charak Samhita
स्त्रीणामत्यर्थगमनादभिघातात् क्षतादपि । शुक्रं प्रवर्तते जन्तोः प्रायेण रुधिरान्वयम् ॥१४३॥
Ejaculated semen with blood is due to excess coitus, (local) or injury. The eighth (type of semen disorder) is due to repression of shukra.
english translation
strINAmatyarthagamanAdabhighAtAt kSatAdapi । zukraM pravartate jantoH prAyeNa rudhirAnvayam ॥143॥
hk transliteration by Sanscript