Although rare like 1 in 200 cases,a pregnancy
is still possible with IUCD in place.
In such types of pregnancy the chances of ectopic pregnancy are increased,so you must consult your doctor as early as possible,once the pregnancy is confirmed..
Other problem is that the chances of miscarriage
is increased in such type of pregnancy.
However once the initial 2 to 3 weeks period is over,pregnancy continues normally.
There is no harm to the baby.