puerperium

lapsivuodeaika puhekieltä The period of time lasting around a month immediately following childbirth, when the mother’s uterus shrinks back to its prepartum state.
1921, Robert Bing & Charles Lewis Allen, A Textbook of nervous diseases for students and practicing physicians: In Thirty Lectures, p84

As exciting causes, psychic traumata, exposure to cold, the puerperium, excesses, have been brought forward.