The period of pregnancy is a very important aspect of fetal growth and development. Maternal weight gain during pregnancy is associated with fetal macrosomia. Generally, delays in low maternal weight gain have been linked to limitations in fetal growth and development, and there is some evidence that low maternal weight gain is associated with an increased risk of pre-term delivery. Objective: To determine the effect of hyperlipidaemia during pregnancy on neonatal growth and birth weight. Methodology: This was a prospective cross sectional study on pregnant who delivered between (1-6) weeks and non pregnant women as a control. Result: There was significant difference between TG of the exposed group (0.87 ± 0.29) mmol/L versus the controls (0.75 ± 0.31) mmol/L p = 0.04. T.CHOL was also significant between the exposed (4.45 ± 0.75) mmol/L and controls (4.03 ± 1.04) mmol/L p = 0.029. Comparing LDL-C of both groups was (2.71 ± 0.79) mmol/L for the cases and (2.26 ± 0.75) mmol/L for the controls a p = 0.005. Also there was a significant difference between HDL-C of the exposed (1.28 ± 0.33) mmol/L and controls (1.45 ± 0.44) mmol/L p = 0.044. There was no correlation between baby's weight and maternal BMI, p = 0.950. Postnatal lipids did not also show relationship with baby's weight. Dyslipidaemia during the postpartum period did not reflect a subsequent increase in birth weight. Conclusion: Generally, the study demonstrated strongly that BMI does not affect birth weight especially in women who are overweight and obese. More so, dyslipidaemia during the postpartum period (1-6) weeks did not correlate or reflect a subsequent increase in birth weight and a possible obesity in later life.