When your child asks you a question related to sexuality, don’t hush down the topic or regard it as if they have asked something really bad.
This way, the kid will forever build a perception that they can’t share anything related to this to you or turn more inquisitive and curious about what you are not telling them. Instead of making things too awkward and uncomfortable for both you and them, take help from everyday examples. For example, when you see a pregnant woman in the neighborhood or see a TV commercial or program related to such topics, use these opportunities to teach your kids about sexual and reproductive health. Don’t bombard them with information that confuses them - instead answer their questions as per their age and level of maturity and be as honest as possible.