Dear Doctor;In my teens, I applied some medicine on my breasts to make them bigger, they grew fuller but now I am a mother and worried that it might not be good for my baby. Are there side effects of breast enlargement to the baby? What of to the mother if the baby suckles? Concerned Woman.Dear Concerned Woman, You have not specified as to what medicines you have applied for enhancing breast size and for how many days. When was this, many days before becoming a mother or recently. Estrogen is naturally occurring hormone in the body which is responsible for feminising features like female breast and is responsible for the size. Besides this, age of a woman, her overall built and body weight also influence the size because breasts consist of fat deposits. Several herbal products available as tablets or local creams for enhancing breast size, contain variable amounts of estrogens. Over long term use, they have same side effects as hormonal pills, that is, increased risk of clotting, increase in blood lipid levels, heart problems, among others.These products are avoided if one is breast-feeding a baby, more so the ointments because they are not safe for the baby.As such, taking a nutritious diet and regular exercise can help one to obtain a shapely figure including shapely breasts. Specific exercises are also available to enhance breast size. These measures are safe without any side effects.