You saying that you don’t bring your niece into this world sounds a lot like the responsibility argument, aka “you had sex and got pregnancy and this is your consequence or punishment”. You really seemed to side step the entire analogy by saying you aren’t the parent. Neither exceptions nor saying that you believe every fetus is the same as a fully formed human answer the question.
How would you feel and react if the government forced you until a dangerous medical procedure to potentially save the life of someone else? Please, don’t side step again. Please, don’t give me “it’s not my fault they’re here, they had sex, therefore they have to do it”. Please, don’t give me “but I think the fetus has rights too”. How would you feel?