Good to hear about your IVF baby, YOu had much luck. That happens. Often babies demand siblings and you are just speechless over this thing but this feels great to know that you are trying for this thing. Even my friend had bit similar case she had an elder daughter and she kept asking for a sibling. But my friend had secondary infertility. But she got lucky enough as she had her second baby boy through IVF. And the elder one has a sibling. What a blessing these procedures are.