Pain has an Element of Blank — Menses

Pain-has an Element of Blank-1
It cannot recollect
When it begun-or if there were
A time when it was not-

It has no Future-but itself-5
Its Infinite contain
Its Past-enlightened to perceive
New Periods-of Pain.
(F.760/J.650)
[1] Pain:: menses pain, cramps, hinted by Periods in line eight. Blank:: nothing happened in the womb.
[4] it was not:: menses was not arrived, implying pregnancy.
[5] no Future:: menses pain means no child, so no future.
[6] infinite contain:: the ovum, infinite hope of life.
[7] perceive:: to receive, a new life.
[8] Periods:: menses, catamenia.