many women have difficulty tolerating prenatal vitamins or experience constipation as a result of the high iron content. due to tolerance challenges, the prenatal vitamin industry has developed a multitude of dosage forms to meet the needs and tolerances of expecting mothers. the most common form of prenatal vitamin is the compressed tablet which is available through all channels and at various quality levels. category leaders utilize this as the dosage form of choice. other organizations within the category offer products in a variety of dosage forms such as liquids, prenatal vitamin soft chews, vitamin chewables, and even jellied prenatal vitamins.