Hi MN - I posted a while ago that I was unable to add my younger child (Aug 2018) to my account in order to get the developmental emails.
Eventually after a bit of fiddling I worked out if I deleted my older child (over 5) I could add the younger one. However, to date I still haven't had any emails :(
I've found the place on the site just to go and read the updates manually but I would love to have it as an email - and it made me wonder if others are signed up for them and whether they are working for them or not?
I got the pregnancy emails last year but I haven't had a single one of the baby ones.