2451 – In my view, you should start by stating how grateful you are that Hashem has fulfilled your request and your wife is pregnant.

This adds to your trust in Hashem that he will do good for you in the future as well. You should be making the proper vessels, Torah and Mitzvot to receive all the blessings. https://www.torahrecordings.com/rebbe/igroskodesh/008/006/2451