The way I look at it is that everyone has something that in their lives at one point or another requires them to take time off of work, which is why there is personal/sick/vacation time for full time jobs (at least I hope there is). Companies do not require people to disclose if they have children or not, children need to go to the Doctors they get sick.
You only need to take 6 1/2 days off in a year, which is really nothing. Also, I am doing my remi this Friday which is a paid company holiday, I have used up my sick/personal already and can use my vaca time but this was just convenient.
I wouldn't say a thing, it is no one's business.