It's up to you. 17 months is still very young, but it might be helpful in the future if you flag it up now. For example, if you would like for your daughter to have a hearing test, you could point to her lack of speech.
In the meantime, try to encourage her to make lots of noises, any noise, car noise, woof, miow, choochoo, whatever. Try to keep your sentences short and repeat key words, and repeat some key words often every day - words such as milk, more, up, etc. If she has a favorite toy give it a short simple name and repeat it lots of times every day. Encourage her to play with toys such as shakers, little drums etc and praise her for making any noises at all. She will find her voice eventually!
I have never really taken any notice of milestones, some children will sit/walk/speak a little later and it's no indication of anything at all. However, if any concerns are noted in your DS' red book, and concerns flagged, it might just be helpful in the future if she doesn't speak at 2.