When I can take new born baby out? My husband said, we can take baby out since 3 weeks while my mum said after 1 month

There is no generally answer to "when" should you be bringing your baby out. Nowadays it is pretty common for babies to go to polyclinics and KK Hospital every few days after going back home to do blood tests for babies. However, do ensure that the baby is adequtely dressed. The generally rule of the thumb is that the baby should be wearing one more layer of clothing than you are. Just be aware of your surroundings as Singapore is a very warm place and our malls can be pretty cold. For me personally, after each polyclinic/hospital visit, I would go walk around and grab lunch first before heading back home. Occasionally, if I am too restless at home, I would walk around my neighbour with my baby sleeping in his stroller.