If there is a female and a male, then it is likely they are! Looks like 28 days for gestation. The female will get a bit shinier and a little bulgy and you might be able to see the babies depending on the momma's color.
Make sure to put a cover over the intake for the filter so the babies are not gonna be sucked up. Usually they stay away but, just in case.
Have you purchased any fry food, or have a plan to feed babies?
It is a good idea to do a substrate vacuum and light rinse on the filter pad - with treated water, not plain chlorine tap water, to preserve the BB. This way you will not need to worry about that as much after there are little babies all around.
Also some frilly / leafy stem plants floating at the top for the babies to hide in are good.
Keep in mind giving the fish some food when the female seems to be birthing, is helpful for them not caring about baby fish, and feed on the opposite side of tank as the momma fish. That way the food doesn't get mixed up with babies as food as easily.
New to FW fish? First tank in a long time or EVER??? Need some info on keeping fish?
Start here - Aquarium Advice Article
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