Dr Bhavi Mody shares a nice blog on managing hairfall after pregnancy :

Hair fall post pregnancy is pretty common. It occurs due to Hormonal Changes in your body.

This said you should rule out medical causes though.

What you can do

1.Check for iron levels, thyroid, Vit D and B 12 levels.

2.Start Homeopathy it helps curb hair fall.

3.use Organic shampoo and Homeopathic oil regularly with internal homeopathic medicines

4.Start with Follihair tablets.

5.Don't use any harsh products and colours.

6.Refrain from ironing or treatments.

7.Don't blow dry.

8.Don't comb when hair is wet

9.Take good care of nutrition. Up ur protein intake.

Have plenty of veggies n fruits

Increase your fluid intake.

10.Stress less n sleep well.Yes when I say sleep well I know with a baby it's difficult but find ways to do that. sleep when the baby sleeps. get help to manage the baby etc but do catch up on Sleep.