Thanks for using Healthcaremagic,
Your concern about her pregnancy
is justified but taking birth control pills during early pregnancy isn't thought to increase the risk of birth defects.
There are few studies which show association between low birth weight
, preterm delivery,development of female sex organ in female baby.
These concerns haven't been observed in clinical experience. Theoretically the risk is very very low so do not worry at all.
If she concerned because she took birth control pills before she knew about pregnancy, be assured that there's little risk.
It's always important to discuss any medication use during pregnancy with your Gynecologist and Obstetrician.
Hope this information is useful.
Wish her safe motherhood.
Dr.Akhilesh Dubey M.D