Which of the following services is included in the maternal health program?

Antenatal registration is an essential service included in maternal health programs as it involves the systematic registration of pregnant women for medical care during their pregnancy. This process helps ensure that women receive timely and appropriate prenatal care, which is crucial for monitoring the health of both the mother and the developing fetus. Through antenatal registration, healthcare providers can track important health indicators, provide necessary screenings, and offer education about pregnancy and childbirth, ultimately aiming to reduce maternal and infant morbidity and mortality.

While postnatal psychological counseling, child vaccination, and nutrition education for toddlers are important components of family and child health services, they fall outside the specific scope of maternal health programs. These services target the needs of postpartum women, infants, and young children, respectively, but antenatal registration is distinctly tied to the care of women during pregnancy, making it the correct answer in this context.