TY - RPRT TI - Fetal Twin: a mechanistic computational model of fetal physiology for heart-rate-variability biomarker research AU - Frasch, M. G. PY - 2026 DO - 10.64898/2026.07.14.738362 UR - https://www.biorxiv.org/content/10.64898/2026.07.14.738362v1 ID - 10.64898/2026.07.14.738362 ER -