This is a randomized controlled trial of prenatal and postpartum supplementation with probiotics and long chain polyunsaturated fatty acids, together with psycho-social counselling, to enhance child cognition at six months of age. The daily supplement for pregnant and lactating mothers ameliorates gut microbiota and cognitive development of their children. Healthy pregnant women in their second trimester will be randomized into control and treatment groups; both will receive psycho-social counselling for child care and emotional wellness. The outcome of cognitive ability at six months of age will be assessed through visual and auditory function, and fetal brain MRI.