During that pregnancy, the mother's antibodies cross the placenta to fight the Rh positive cells in the baby's body. As the antibodies destroy the red blood cells, the baby can become sick. This is called erythroblastosis fetalis during pregnancy.
Sometimes, however, as in a lyric poem, the effect intended may be the rendering or creation of a mood, such as that of happy content, and in that case the poem may not have an easily expressible concrete theme. Lyric poems are expressions of spontaneous emotion and are necessarily short.
ode. n. 1. A lyric poem of some length, usually of a serious or meditative nature and having an elevated style and formal stanzaic structure. classical Greek poem modeled on the choric ode and usually having a three-part structure consisting of a strophe, an antistrophe, and an epode.