Nothing. Men do not have symptoms when a woman is pregnant.
because you have a very close bond with each other and he is your other half so he shares the feelings
Absolutely, its called Sympathy Sickness. When a couple gets pregnant all the emotions that the woman feels from start to finish are taken in by the male. It is something that happens to only the closest of couples though. Not every male has it in him to let the angst of a woman affect them because they think its not manly. If you ask me it is more of a man that feels the pain with his woman than not. It shows that he has a beautiful soft sensitive heart. it's possible, it's called synthetic pregnancy, or something that sounds like that. It's fairly rare though.
In order for a woman to get pregnant, she must have sperm from a man.
Exactly the same as a non-pregnant woman or a man.
No, some go without any symptoms.
Yes, she can. But a test will clear any doubt.