I recently came across this article, and it provides a sobering insight into how important the bond is between a mother and child during the first year:
http://nymag.com/thecut/2016/06/attachment-theory-motherhood-c-v-r.html
It’s a very long article, so I recommend saving it into your favourite reader, like Pocket (https://getpocket.com/), for when you have 20 minutes free with a good cuppa coffee.