Toà-kūi ê chhī-leng tōng-bu̍t teh seⁿ-thoàⁿ (reproduction) ê 1 ê kî-kan, ùi siū-cheng (fertilisation) ê tēng-nn̄g (zygote) tī seⁿ-kiáⁿ-tē (uterus) tiâu-ki (implant) khai-sí, kaù kah lī-khui seⁿ-kiáⁿ-tē kiat-sok. Jîn-lūi toà-kūi hō chò ū-sin.

Toà-kūi ê sai-bú.