A new study says pregnancy six months after a miscarriage is less complicated than in women who wait more than half a year to conceive again after losing a newborn at birth.

Those who conceived six months after a miscarriage also are less likely to repeat a miscarriage, to give birth via caesarian section, to deliver prematurely or to have low-birth weight babies, according to the study published in the British Medical Journal.

The study reviewed the medical histories of 30,000 Scottish women who had their first miscarriage but gave birth again between 1981 and 2000.

However, the findings contradict a World Health Organization (WHO) recommendation to wait for six months before getting pregnant again. It is also contrary to some doctors, who suggest holding off pregnancy longer than six months.

The WHO recommendation was based on an earlier study of 250,000 Latin American women who got pregnant six months or less after a miscarriage.