It is generally recommended to limit consumption of sugary drinks, such as Fanta, during pregnancy. While occasional consumption is unlikely to cause harm, excessive intake may lead to issues like gestational diabetes or excessive weight gain. However, if you have been consuming Fanta in moderation and your overall diet is balanced, it is unlikely to have a significant impact on your baby's health or yours. It's always best to consult with your healthcare provider for personalized advice based on your specific circumstances.