I had a dream that me and my partner had a baby girl, but we don't have any kids right now- what does it mean?
If you dream of being a mother when you aren't in your waking life it can foretell a surprising event that's going to happen to you.
Another interpretation is that you need to be more nurturing, compassionate and caring towards others, particularly your loved ones. It's possible that you are not showing these qualities to someone close to you and they are suffering from your perceived indifference.
One thought is that it's highlighting an aspect of your character that's creative or full of wisdom that you are perhaps not making the most of. Similarly you may be a loving and affectionate person but have hidden that side of yourself of late and it might be time to let it out again to be true to you and for the sake of your relationships.
The A-Z Dictionary of Dreams by Ian Wallace