Correct spelling for the English word "stegmonth" is [stˈɛɡmʌnθ], [stˈɛɡmʌnθ], [s_t_ˈɛ_ɡ_m_ʌ_n_θ] (IPA phonetic alphabet).
The puerperium, the period, roughly calculated as one month, between childbirth and perfect return to the normal state.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.