With the aim of being able to advise women concerning a recommended interval between spontaneous abortion and a new pregnancy, the course of pregnancies following spontaneous abortion was studied. Nineteen women conceived within the first 12 weeks. There were no abortions, and 18 pregnancies proceeded normally. Thirty women conceived between 12 and 26 weeks, 29 pregnancies proceeded normally, and none aborted. Forty-two women conceived later than 26 weeks after the abortion. Seven pregnancies terminated in abortion, and 30 proceeded normally. We found no reason to advise women to postpone a new conception after spontaneous abortion.