TY - RPRT TI - Rhythmic changes in estriol excretion during pregnancy. AU - A Isaksson AU - A Kallner AU - O Lantto AU - C Somell PY - 1980 DO - 10.1016/0002-9378(80)91131-x UR - https://pubmed.ncbi.nlm.nih.gov/7189961/ ID - 7189961 ER -