
She will just have reached the minimum age you should be contemplating breeding from her. You will need to get her Hip and Elbow scored, and eye tested. the Hip scoring will have to be done as soon as possible, as it is best done midway between seasons, and the results can take a month to come back.
I would also suggest you join your local breed club, and contact your bitches breeder for advice on choice of Partner. are you hoping to produce good Working dogs, or ones that will be a credit to you if shown? It goes without saying that you should be aiming to produce healthy good tempered companions.
Also have you considered the ongoing commitment to the puppies, will you be in a position to help and advise the new puppy owners, and possibly have back any that do not work out, or where circumstances change, perhaps many years from now?
Use this time to study the requirements in a good Labrador, read as many books as you can, attend some shows or Working events. These will all be of help in your Quest to produce pups that will be a credit to the breed.