The initial booking visit sets the foundation for the entire pregnancy journey. Midwives use this first comprehensive contact to gather essential baseline data that helps guide clinical decisions. During this session, a thorough medical, surgical, obstetric, and social history is taken. Routine screening tests are initiated immediately to catch any pre-existing conditions or infections that could threaten maternal-fetal health.
Knowing how far along a pregnancy has progressed dictates every clinical milestone. Midwives rely on two main tools to establish and verify gestational age: the date of the Last Normal Menstrual Period (LNMP) and early ultrasound scanning.
When calculating via LNMP, the midwife applies Naegele's Rule: add seven days to the first day of the last normal period, add one year, and subtract three months. However, many women in low-resource settings may not remember their exact LNMP due to irregular cycles, lactational amenorrhea, or early pregnancy bleeding. In such cases, an early booking ultrasound measuring the Crown-Rump Length (CRL) in the first trimester provides the most accurate estimation of gestational age, often reducing the margin of error to within a few days.
Every subsequent antenatal visit follows a systematic approach to monitor both maternal well-being and fetal growth. Midwives perform these checks to catch subtle deviations from normal physiology before they escalate into emergencies.
Fetal growth must be tracked consistently to ensure the baby is developing adequately. A key physical check is measuring the Symphysio-Fundal Height (SFH) in centimeters using a non-stretch tape measure from the top of the symphysis pubis to the fundus of the uterus. From 24 weeks gestation onward, the SFH in centimeters should roughly match the gestational age in weeks, with a normal variation of plus or minus two centimeters.
In addition to physical measurements, midwives educate mothers on monitoring fetal movements starting around 20 weeks for multiparous women and 22 weeks for primigravidas. A sudden decrease or cessation of fetal movement is a critical warning sign of fetal distress that requires immediate evaluation.
Pregnancy triggers profound changes across every organ system in the female body. Blood volume increases by up to 40-50%, leading to hemodilution where the plasma increase outpaces the rise in red blood cells. This physiological adaptation results in a normal drop in hemoglobin levels, often referred to as physiological anemia of pregnancy.
Midwives must distinguish between normal physiological changes and pathological findings. For example, mild dependent edema in the lower extremities late in the day is common due to increased venous pressure from the gravid uterus. However, generalized edema affecting the face and hands, paired with sudden weight gain and hypertension, indicates a pathological process requiring urgent intervention.
Midwives act as the first line of defense in identifying obstetric emergencies. Educating women on danger signs during antenatal visits empowers them to seek help promptly. Every pregnant woman must be counseled to report specific symptoms immediately:
Accurate, timely record-keeping ensures that every healthcare provider caring for a pregnant woman has access to her complete clinical history. In Nigeria, the mother-held antenatal card, often called the clinic card or case note, serves as a vital communication tool between primary health centers and tertiary referral facilities.
Midwives must record all vital signs, lab investigations, treatment plans, and health education sessions clearly and legibly. Proper documentation prevents medical errors, protects against liability, and ensures seamless continuity of care when a client is transferred due to obstetric complications.