Creating a baby book for a girl can be a lovely way to capture memories and milestones from her early years. Here are some ideas for content you can include:

1. Personalized Cover: Design a cover with the baby's name and a cute, girly design.

2. Family Tree: Include a family tree page where parents can fill in names and relationships.

3. Birth Details: Record important details like the baby's birth date, time, weight, and length.

4. Firsts: Document the baby's first smile, first word, first tooth, etc.

5. Monthly Updates: Have a section for monthly updates with photos and notes about the baby's development.

6. Special Occasions: Include pages for special occasions like the baby's first Christmas, first birthday, etc.

7. Favorite Things: Have a section where parents can write about the baby's favorite things (e.g., foods, toys, books).

8. Handprints and Footprints: Include pages for handprints and footprints, either with ink or as a cut-out template.

9. Letters to Baby: Have pages where parents can write letters to the baby, sharing their thoughts and feelings.

10. Photo Pages: Include plenty of pages for photos, with space for captions or notes.

11. Pocket for Keepsakes: Add a pocket or envelope at the back of the book for storing small keepsakes like hospital bands, locks of hair, or other mementos.

12. Growth Chart: Include a growth chart where parents can track the baby's height and weight over time.

13. Quotes and Poems: Include inspirational quotes or poems about babies and parenting throughout the book.

14. Advice and Tips: Include pages with parenting advice and tips for taking care of a baby.

15. Back Cover Message: Add a heartfelt message on the back cover, wishing the baby well as she grows.

Design the book with cute, girly colors and illustrations to make it appealing for a baby girl. Personalize it further by adding unique details that are special to the baby and her family.