It is a joy to have a baby to love and care. But only a mother knows the various difficulties of having a child. She is very helpless and tired after child birth. Most mothers do have some postpartum depression, and only her near and dear can can help her. You could help your daughter to get over this depression.
You have been a mother too so understand why she is irritable, sleepless, has appetite changes and cannot bond well with her child. She feels so tired and weak. Help her by telling her that it is natural after going through a a major procedure of child birth.
You as a mother could help your daughter by explaining to her that her body has undergone various hormonal changes and that she needs to take rest to be able to take up the full responsibility of the child. Tell her that you all are there to help her and that she is not alone. Ask her to take rest and feel better. Then she could shoulders the responsibility of bringing up the child.
Give your daughter good nutritious food, so you can help your daughter to feel good and energetic and experience good moods. Look after her child, letting her to sleep and relax more often. If she cannot sleep, You could give her something hot to drink and leave her alone to relax. As she relaxes, she will be in a better position to overcome postpartum depression.
Talk to her about her child. Involve your son-in-law and allow them to have some private moments together. Let them talk to each other and feel close. This would help your daughter to feel good and get over postpartum depression. Let your son-in-law make her feel happy and assure her that they would love and bring up their child well.
Allow her to listen to light and soothing music, which could help lift her moods, relax her and rejuvenate her and help your daughter to overcome postpartum depression.
To conclude, you could help your daughter through postpartum depression by creating a feeling in her that she will soon become very capable to handle the task of bringing up the child. Reassurance goes a long way to put her soon on her foot having overcome postpartum depression.