Multivariate Spectral Analysis of Transabdominally Recorded Intrauterine Acoustic Signals (TRIAS) Across Gestation. - Tamaki R; Igarashi F; Yamamoto R; Asano H; Oku A; Akabane K; Noshiro K; Hosokawa A; Saito Y; Watari H; Umazume T (Sensors (Basel, Switzerland), 2026)