It doesn't matter because children don't even have conscious thought for maybe a few months after birth. Do you remember being in the womb? Were you hoping you wouldn't be aborted? Aborting a fetus is no different from wasting sperm cells through beating off or losing an egg through a menstrual cycle. Hell, millions of sperm are destroyed everyday in favor of newer sperm. Is it unfair that those sperm or those eggs didn't get a chance to live? Of course not.
Having conscious thoughts doesn't matter. You said it yourself, you have no conscious thoughts until months after you are actually born. We both know you wouldn't say that killing a 2 month old baby is OK because the baby has an undeveloped mind. By that logic I don't think saying that abortions are OK because the fetus doesn't have conscious thoughts is an acceptable justification for abortion.