Participants receiving standard antenatal care without having any vitamin-D supplementation/intervention

Participants receiving 2000IU/day of Vitamin-D supplementation, in addition to having standard antenatal care

Participants receiving 4000IU/day of Vitamin-D supplementation, in addition to having standard antenatal care

Participants receiving a daily dose of vitamin D supplementation

Incidence of Pre-eclampsia (percentage of Females having proteinuria on urine dip test with blood pressure > 140/90 mmHg)

Incidence of Gestational diabetes (percentage of females having abnormal glucose intolerance i.e. fasting glucose > 92mg/dL, after using 75g glucose load one-hour glucose > 180mg/dL or two-hour glucose > 153mg/dL)

Incidence of Caesarean delivery (% age of females having surgical delivery of baby via incision on abdomen and uterus)

Incidence of low birth weight babies (percentage of neonates weighing <2.5kg)

Incidence of pre-term delivery (percentage of live births before 37 completed gestation weeks)

Apgar scores (The 10-point Apgar score has been used to assess the condition and prognosis of newborn infants throughout the world. Each of five easily identifiable characteristics i.e. heart rate, respiratory effort, muscle tone, reflex irritability, and color is assessed and assigned a value of 0 to 2. The total score is the sum of the five components, and a score of 7 or higher indicates that the baby's condition is good to excellent. The Apgar score is determined at one and five minutes after delivery and is therefore a rapid way to evaluate the physical condition of newborn infants. Of the two scores, the five-minute score has come to be regarded as the better predictor of survival in infancy.)

To determine whether the baseline vitamin D levels are modified by vitamin D supplementation. (Post intervention mean vitamin-D levels in ng/dl)