It will vary according to the laws of the state or country that they are in. It could be considered a sex crime in many places, but some locations have close in age exceptions or defenses.
Weirdo
If she was below the age of consent it would be prison for statutory rape.
The 18 year old would go to jail and be put on the sex offender list.
oooooo dear he's been a naughty boy
I have already answered this question. The sex is legal in both states so nothing will happen to him.
Well then that 17 year old would have early parenting, or they could get an abortion, which is frowned upon by many people, but not illegal
He is an adult in the eyes of the law and will be charged, tried and sentenced.
The girl would be burdened with pregnancy at 16, and the guy would go to jail
This would include jail time for the person as it's statutory rape. The mother would decide whether to keep the child or not.
He will be most likely charged with rape.
Jail, hopefully.
If your dog has Valley Fever and is pregnant, best would be a trip to the vet. It could spread to the puppies.