Elevated serum sFlt-1 at 18–20 weeks in advanced maternal age: a key difference from younger pregnancies. - Nemoto, Kazunari; Kumasawa, Keiichi; Kinugawa, Motoaki; Nakajima, Keisuke; Inaba, Kei; Ichinose, Mari; Toshimitsu, Masatake; Sayama, Seisuke; Iriyama, Takayuki; Osuga, Yutaka; Hirota, Yasushi (Hypertension in Pregnancy, 2025)