I don't know how easy it would be, but I would assume that if Jack wanted to on the island he would be capable.. I am sure they could find the supplies for a "risky abortion" but would the others allow them to use their equipement I would doubt.. I think it would end up being a risky procedure without the proper medical supplies and I doubt the others would be willing to let them use the proper supplies that would be needed.. IMO

__________________
Please don't give up, Des. Because all we really need to survive is one person who truly loves us. And you have her. I will wait for
you. Always. I love you, Pen

DESMOND: I love you, Penny. I've always loved you. I'm so sorry. I love you!
PENNY: I love you too.
DESMOND: I don't know where I am, but--
PENNY: I'll find you, Des--
DESMOND: --I promise--
PENNY: --no matter what--
DESMOND: --I'll come back to you--
PENNY: --I won't give up--
BOTH: I promise. I love you.