Step 1: Understanding the term ‘after birth’.
After birth refers to the structures that are expelled from the uterus following the delivery of the baby during parturition.
Step 2: Components of after birth.
After birth consists of the placenta, umbilical cord, and foetal membranes which are no longer required after the baby is born.
Step 3: Analysis of options.
(A) Incorrect — this refers to postnatal changes in the mother.
(B) Incorrect — unrelated to after birth.
(C) Incorrect — describes postpartum hemorrhage.
(D) Correct — accurately defines after birth.
Step 4: Conclusion.
After birth is defined as the collective mass of placenta, umbilical cord, and foetal membranes.