The fetus receives oxygen through something called the umbilical cord, through the mother. The fetus is entirely dependent on the mother. To say that an unborn and dependent human has the same humanity and rights as an independent person is far fetched. In order for Chang to convince me of anything he is going to have to provide some evidence. The question of when life begins is not something that humans are capable of knowing.
Overpopulation is a very real concern which is constantly ignored.
But there is no child involved in an abortion. Women who have abortions generally do not have evil intents. This fallacious, fuzzy, black and white thinking is the obstacle to solving many problems. It is an erroneous type of logic, which is narrow-minded and limits intelligent thought. This is not a word that one can loosely throw around these days.