Sometimes when babies are born, it's not very clear whether they are a boy or a girl. This can happen if their genital area looks different than what we usually expect for a baby boy or girl. We call this "ambiguous genitalia" because it's not clear what gender the baby is.
The baby's doctor will do some tests to figure out what's going on. They might take a look at the baby's chromosomes, which are like a recipe book that tells your body how to grow. If the baby has XY chromosomes, they are a boy; if they have XX chromosomes, they are a girl. But sometimes, the chromosomes don't match what the baby's body looks like on the outside.
The doctor might also do some tests to see if the baby has male or female hormones in their body. Hormones are like special chemicals that tell your body how to grow and work. If the baby has more male hormones, they might develop more like a boy. If they have more female hormones, they might develop more like a girl.
Sometimes, doctors might need to do some surgery to help the baby's genital area look more like a boy or girl. This can be a hard decision for parents to make, but the most important thing is to make sure the baby is happy and healthy. Overall, it's important to remember that everyone is different and special in their own way, and it doesn't matter if someone is a boy, girl, or somewhere in between.