Women usually sew a little extra string on the top part of the gi to close it there. You get that as a matter of course in the shop when you buy a gi here... not where you live?
In the States, no. All gi are sold as if for a man, no modesty ties as I've seen on women visiting from Japan. We are left to do it ourselves and most don't, opting to wear t-shirt underneath instead. Me, I don't like having extra layers n warm weather so always add ties as part of my routine dogi modifications.