Correct spelling for the English word "tautomenial" is [tˌɔːtə͡ʊmˈiːnɪəl], [tˌɔːtəʊmˈiːnɪəl], [t_ˌɔː_t_əʊ_m_ˈiː_n_ɪ__ə_l] (IPA phonetic alphabet).
Relating to the same menstrual period.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.