Nutritional science is the study of how food nourishes the body, affects metabolic processes, and influences overall wellbeing. For midwives practising in Nigeria, understanding this science goes far beyond calculating daily calories. Pregnancy and lactation place massive physiological demands on a woman's body, transforming her nutritional requirements. A deficit during these critical windows can lead to poor maternal outcomes, low birth weight, and developmental delays in the infant. Midwives act as the primary educators in antenatal clinics, translating complex biochemical concepts into practical dietary advice that mothers can apply using locally available foods. Recognizing the direct link between maternal diet and fetal development forms the foundation of safe, holistic midwifery care.
Food encompasses any solid or liquid substance that, when ingested, digested, and absorbed, provides the body with essential nourishment. In the context of West African public health, food sources are broadly categorized into plant and animal origins. Plant sources include grains like maize, sorghum, and rice, alongside legumes, tubers, and vegetables. Animal sources provide high-value proteins and specific vitamins through meat, fish, eggs, and dairy.
Every food item consumed contributes uniquely to maintaining homeostasis and supporting life processes.
Nutrition is the biological and social process by which living organisms obtain and use food for sustenance, growth, and tissue repair. It involves ingestion, digestion, absorption, transport, and cellular utilization of nutrients. Good nutritional status acts as a shield, bolstering immune function and preventing deficiency disorders. Conversely, poor nutrition opens the door to chronic illnesses, fatigue, and heightened vulnerability to infections like malaria. In maternal health, optimal nutrition ensures adequate blood volume expansion, lowers the risk of postpartum hemorrhage, and supports healthy neonatal outcomes. Nutrition is therefore not merely about filling the stomach, but about biochemical optimization.
Nutrients are chemical substances found in food that are categorized based on the required quantities and primary functions.
A common mistake among student midwives is assuming micronutrients are less important because they are needed in smaller quantities. In reality, a severe shortage of a single micronutrient like folate can cause devastating neural tube defects.
A balanced diet provides all the essential nutrients in correct proportions and appropriate amounts to support optimal health and bodily function. It is not about eating expensive imported foods, but about combining local staples intelligently.
Midwives must encourage pregnant women to draw from various food groups to prevent hidden hunger—a state of micronutrient deficiency where calorie intake appears adequate, but vital vitamins and minerals are missing.
Malnutrition refers to deficiencies, excesses, or imbalances in a person's intake of energy and nutrients. It manifests in two main forms: undernutrition (stunting, wasting, underweight, and micronutrient deficiencies) and overweight or obesity. In Nigerian communities, undernutrition among women of reproductive age and young children remains a major public health challenge.
Midwives must screen routinely for both sides of the malnutrition spectrum during antenatal visits, using tools like mid-upper arm circumference (MUAC) tapes to identify women at risk early.