
It is early days yet, some show at 5 weeks others dont, we mated our female in Germany almost 8 weeks ago (1 mating) this is all you are allowed with their top dogs, a 20 minute tie, and she is heavily in welp now, only started to show properly at 6.5 weeks, if the day is correct 1 mating can result in puppies, most who use our stud dog only had 1 mating (their choice) as they had a long way to travel, all have had litters.
Get your friend to get her female scanned, to put her out of her misery, they can scan at 4 weeks, some earlier with the modern ultrasound machines. good luck x