B.,
I understand your point and I would not encourage people to ignore family relations and good manners in the name of Fb or other unpersonal ways of communication. We have to be able to control ourselves and not let those media control us, we ought to be human AGAIN... Everyone of us know how important relationships are, whether friends or families, we get to respect that. I will never announce to my good friends or to my family member, does not matter whether the relationship is perfect or not, family is family, we do not choose to be long to a particular family, we do not know why we are just part of a family and we get to respect that natural relation. Let's wake up and be civil to one another. I gave birth 4 times and every time, I take time, after birth, either myself or my spouse, to inform within a short time frame, my parents, siblings, close family members and close friends, they do understand that I maybe tired, but they also want to share the joy because, they are the one who feel my pain when I am not OK, IT IS NOT FACEBOOK.
B., call the new parents and congratulate them and send a gift to the new born. Do not bring the subject to their attention yet, later, 6 months or so after the incident, express your feelings and hope that they would understand why you are still old fashioned like most of us.
Congrats,
Vava