Dreams about giving birth often symbolize new beginnings, creativity, or the development of a new aspect of yourself. In your dream, the birth of a baby girl with features from both you and your partner suggests a merging of your identities or experiences, reflecting the growth of your relationship. The excitement and happiness you felt indicate positive feelings about this new chapter in your life.

The presence of your grandmother's grey eyes might signify wisdom, heritage, or family connections. It could represent the influence of family in your life or a desire to honor your lineage.

Your partner's mixed emotions—happiness alongside sadness—could reflect unresolved feelings related to past experiences. This dream might be prompting both of you to process these emotions while also looking forward to your future together.

Overall, this dream could be encouraging you to embrace new opportunities and to communicate openly about any feelings related to past losses. It’s a powerful reminder of the importance of both joy and vulnerability in relationships.