Thank you all for your responses. I apologize if I unintentionally intitiated a pro life/pro choice argument. That was not the intention.
Just to answer some of the questions that were raised here-
Fellowship is always optional, I just don't want the option of not doing it. Being a foreign grad from a community hospital, it was extremely difficult for me to secure a spot, this was my 3rd and last time trying. My program director from residency will not give me any further letters if I leave this spot, so, I have never considered leaving the fellowship. I guess, I could talk to the program director, I am worried that he will ask me to hold off and reapply. I am okay with waiting a year or six months or starting on time and finishing late. I just do not want to lose this opportunity for good.
Reduction to singleton pregnancies is safe and is actually shown to have better outcomes than twin pregnancies. I don't think I was considering it, I guess I was looking for reassurance saying that it is okay, but I know no one can do that, I will try to talk to the program, stay well and hope for the best.
Once again, thank you all for the support.
You didn't spark debate on my side. I was merely giving you an opinion from my point of view. Perhaps there are some who don't like that, but those that post here are not of the same background, and it's important for you to hear differing views, whether you agree with them or not.
Ultimately, it's your decision, I just know what I would do in this case, and that's the best I can discuss. It's important for you to talk about your concerns, though, and I'm glad you did. Good luck in your decision.