akuperma,
The customs about not telling (among Jews, and others) dates back to the time when most babies didn’t make it, and you were almost as likely to be planning on attending a funeral (for the mother) rather than a bris. That is now history, ???? ???.
I’m not sure there was ever a time in history that the majority of babies didn’t make it past a week, or that a majority of mothers died during childbirth. Certainly there have been periods where these rates were too high, due to disease, malnutrition, poor hygiene, or dangerous practices. Hashem created the human body with wisdom, it is surely capable of giving birth!