Not exactly, a lot of people may tell you that the gestation period for a mouse is between 18-23 days but my mouse turned out to be pregnant when we bought her and she had her babies at 6 weeks!
3weeks
Wait until the mouse babies come!!!!!!!! Or I'm sorry to say, get rid of her.
Bkz it has babies in the future. Use the time machine to find out.
If your mouse is getting fat and is starting to nest that means she is pregnant. and is getting ready for her babies.
if she gets a little heavier and if later on in pregnancy the babies start to show and the female looks "lumpy" because of the babies in her.
Yes we had a pregnant mouse who was in a cage with 7 other female mice, so we put her in her own cage. When she has her babies, she will make a nest for them so make sure there is plenty of bedding. If you do not separate them the baby mice might be at risk, although a pregnant mouse can be kept in the same cage. If her babies are in the cage with other mice, she might nip and bite the mice to protect her babies though
No, mice often have up to 3-4 babies at one time
3weeks
It is normal for a mouse to have 10-12 babies. My mouse had 10. The most babies a mouse has reportedly had is 17.
Hi well you probably putted a male mouse and a female mouse together and they would make babies, and she'll look like a golf-ball e.g The mouse probably will be getting bigger in the belly if it is pregnant or your just feeding it to much food which is making it look like a pig.
no they will fight, and some babies may die.
Babies do not grow in your stomach. That is where your food goes. A trans-vaginal ultrasound scan would be the best way of 'seeing' an early uterine pregnancy, although it is likely to not be able to detect much at 3 weeks.