Question: Is it possible for a haram (forbidden) act committed by a pregnant mother, such as watching television or listening to music, to influence the unborn child?
Answer: Nobody can deny the fact that the behavior of the mother affects the child she is carrying. The emotional condition of a pregnant woman also affects the child. Thus, women are exhorted to remain calm, composed, happy, free of stress and gloom. If the woman's physical and emotional condition can have an effect on the baby, why would it be far-fetched to believe that the spiritual condition too, has a strong influence?
Just as it is important for the mother-to-be to look after her health, it is equally important if not more, for her to remain clean spiritually. This will include refraining from all forms of evil and sin. Of course, some sins have a stronger effect than others, just as carelessness in certain physical aspects is more dangerous than in others. Watching T.V, listening to music, viewing haram things, eating doubtful/haram food, all of these immensely harm the spirituality of the unborn child, and continue to do so even while the mother is breastfeeding. Accordingly, the pregnant mother should be punctual with Salah (prayer) and recitation of the Glorious Quran.