Abstract: A pregnancy monitoring device and method improve detection in the first trimester of the occurrence of ectopic pregnancy and the occurrence of multiple foetuses. The device includes a sample absorbing member and an analyser to analyse a plurality of sequential a biological liquid samples and computing means to determine an ovulation date and deviations in the measured quantity of hCG from predetermined values which are indicators of ectopic pregnancy or multiple pregnancy. The device and method enables early detection of ectopic pregnancy or multiple pregnancy.