Which feature is the most important when deciding on a mechanical breast pump?

When selecting a mechanical breast pump, the most crucial feature is the cycle pressure sustained for a specific duration, such as 2 seconds, and a rate of 30 pumps per minute. This parameter is vital because it mimics the natural sucking pattern of an infant, which is important for effective milk expression. Consistent and rhythmic suction is necessary to stimulate milk production and facilitate the let-down reflex in the mother.

The effectiveness of a breast pump largely depends on how well it simulates the baby's suckling, making this feature a key consideration for ensuring adequate milk supply and comfort during the pumping process.

Other features, while beneficial, do not directly influence the pump's ability to express milk as effectively as the cycle pressure and rate of pumping. For instance, manually controlled pressure may provide some customization for comfort but could lack the automated consistency needed for optimal milk flow. Similarly, while a negative pressure of greater than 250mm/hg can indicate powerful suction, it's the combination of proper cycling and pressure that truly mimics a breastfeeding session. Lastly, having a battery backup is convenient for mobility but does not affect the primary function of the pump in delivering efficient and effective milk expression.