> 1 in 3 eggs don't make it for every kne that does. Does the Catholic church want to do anything about those?

The Catholic heirarchy views that no differently than other natural death, which, while it might be something better to reduce, is not an active moral wrong the way homicide (including, in the view of the heirarchy, direct abortion) is.

(I say “heirarchy” rather than “Church” here because the evidence suggest that the mass of the faithful, the body of the Church, aren't particularly in line behind the heirarchy on this issue—polls in the US, for instance, fairly consistently see virtually no difference in distribution of political views on abortion between Catholics and Americans generally.)

The church would support medicines to help these children implant and make it. However, it is also the same as natural death (trying to increase the chance of non-implantation is the same sin as abortion). Speaking from personal experience with our recurrent miscarriages, Catholic doctors cared the most, and ultimately, their diligence and dedication is why we have our daughter. The rest told us to just forget about it. The Catholic ones cared, and are why we have living children.