A pilot study: Auditory steady-state responses (ASSR) can be measured in human fetuses using fetal magnetoencephalography (fMEG).
Niepel D, Krishna B, Siegel ER, Draganova R, Preissl H, Govindan RB, Eswaran H. A pilot study: Auditory steady-state responses (ASSR) can be measured in human fetuses using fetal magnetoencephalography (fMEG). PLoS One. 2020; 15(7):e0235310.