What and when to tell

It is common practice to not announce a pending birth until the end of the first trimester. The risk of miscarriage greatly reduces at this point and many health problems have been identified. Well with adoption there are so many layers. Birth parents begin looking at portfolios during their 6th month which means that if we wait to "announce" our pregnancy it is only 3 quick months away. With that said if we announce we are starting the adoption process its 1-5 years before a birth mom may pick us. I think we are going to have to pick a happy medium as we have already started to share with people individually and dont want anyone left out. We have already told our parents and will likely tell our siblings our definite commitment to the process in the next few weeks. I think an announcement to extended family once we have been approved for adoption will likely be the most ideal time to share the big news :) As the process proceeds I may have regrets or better advice on this one.