My son saw in a dream that i gave birth to a baby...

Praise is to Allah. We seek refuge in Him. He is not misguided. He who is guided by Allah no one shall mislead him. And no one shall guide a misleading person. I testify that there is no god but Allah, who has no partner and that Muhammad is His servant and His Messenger.
My honorable customer,
Giving birth means getting rid of sadness and big responsibility, and the baby indicates to good news as Allah SWT said " we delighted her by Isaac" and " If someone get good news that he will have baby girl".
So giving birth may indicates to happiness the vanish of sadness.
I ask Allah to guide you to what He loves and pleases, and to go beyond the evils of your deeds and to enter us and you in His mercy.
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Kind Regards,

The dream normaly do not give a specfic meaning that you will give birth to a girl as it only shows example but do not specify, therefore maybe you will give birth to a girl but not for sure, just make dua that Allah choose for you the best.
And Allah knows best,