Faris - 9 month old, second week

If your baby seems more clingy than usual, she's probably feeling separation anxiety - perfectly normal for a nine-month-old. It's really a good sign, showing that she's now able to distinguish between the familiar and the unfamiliar. She may refuse to open her arms to other adults, even ones she knows, and she may find bedtime distressing because it separates her from mum and dad. Separation anxiety usually peaks between 10 and 18 months, and then gradually fades. With extra cuddling and reassurance from you, she'll get through this stage and back to her social self.

Source : Baby centre