One spring 20+ years ago, I had an abortion and terminated my pregnancy for reasons that some would argue amounted to "convenience". Then, because I was no longer pregnant, only two months later, I was able to get pregnant again. I would not have had my twins had I not terminated the prior pregnancy.

The problem is that no one can predict the future. All we can do is make the best decisions we can with the limited information we have. The decision should be left to the individual woman.

Major research study on the effects of abortion.
Induced First-Trimester Abortion and Risk of Mental Disorder
Trine Munk-Olsen, Ph.D., et. al
N Engl J Med 2011; 364:332-339
January 27, 2011

Perhaps you would like to read about the
Effects of Pregnancy

Reasons for a late-term abortion