How did the obstetric metaphors from the Gettysburg Addres

How did the obstetric metaphors from the Gettysburg Address (1863) relate to the “perfume” and “atmosphere” from Whitman’s Song of Myself (1855)?

the ONLY sources you are permitted to use for this writing assignment are those materials assigned in class; NO outside sources

no fewer than 900 words; no more than 1000 words
A creative title to the essay
NO headings, NO title page; one line for your name, one for the title, and then start writing; fill the first page, don’t keep hitting return at the beginning
Times New Roman font
12-point sized font
double-spaced
page numbers at the bottom of each page