We experienced three cases and four successful deliveries with congenital a
fibrinogenaemia and propose the following guidelines for the prenatal and p
eripartum management: (i) genital bleeding usually begins at 5 weeks' gesta
tion and spontaneous abortion always occurs at 6-8 weeks' gestation without
fibrinogen infusion: (ii) the fibrinogen level must be at least 0.60 g/l a
nd, if possible, higher than 1.0 g/l during the pregnancy; (iii) the necess
ary amounts of fibrinogen increase as the pregnancy progresses and the pret
erm labour occurs; (i ir) the fibrinogen level under the continuous infusio
n of fibrinogen during labour must be at least 1.5 g/l and, if possible, hi
gher than 2.0 g/l to prevent placental abruption: (v) the puerperium is usu
ally uneventful with a reduced dose of fibrinogen infusion.