Well if your hamster's belly is bulging and you know that you took her to a male hamsters cage then she may be in labor. Also if you see her gathering food and change in personality (very protective of herself, biting, ect.) those are also signs she's in labor. But once you know if she is and the babies are born DO NOT disturb her for she may kill or even eat her babies. But do not be alarmed it is in their nature. Also after they mature separate them unless you want even more babies. Oh and you'll know if you see her gathering stuff for her nest. Hope I helped!
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i don't know if i get your question but i think that is urine.
Labor for a hamster typically lasts around 1-2 hours. It's important to provide a quiet and calm environment during this time to reduce stress on the mother. If labor extends beyond 2 hours or the mother appears to be in distress, it may be necessary to seek a veterinarian's advice.
Only a vet that has evaluated and weighed it can know for sure, otherwise your hamster can get an overdose.
only MALE HAMSTERS LICK FEMALE HAMSTERS SCENTS "I KNOW THAT BECAUSE I HAVE A MALE HAMSTER & A FEMALE HAMSTER".
yes it will help the labor
It depends on the hamster, so i dont know.
maybe she is sleeping.
What is a hamster that has no legs called? A furball.
you get it
Ask yourself one key question: "Do I want a hamster?" If the answer is yes, then any hamster will do.
a hamster doesnt know how to swim this is all i know soz
they can be in hamster labor from 1/2 hour till around 3 hours thats vagly
you will have to ask the person who sold you the hamster that is the only way.
If you see the hamster looking and nibbling for a place to get out, then they want to get out. I found this answer because my own hamster escaped. 
If he bites you.
hamster tumors are just the same as a humans. When you start to feel small or large bumps on a hamster you will know that its a sign and you should immediately take your hamster to the vet, and they will see what they can do, or if your hamster is in pain, they can put your hamster to sleep humanely.