Ditto with 123kid123. Just because many people are doing it, that doesn't mean that it's alright to do it. There is legal basis on why you should not do abortions. Number one, the civil part. Here's the whole of Book One, Chapter Two of the New Civil Code pertaining to natural persons:
CHAPTER 2
NATURAL PERSONS
Art. 40. Birth determines personality; but the conceived child shall be considered born for all purposes that are favorable to it, provided it be born later with the conditions specified in the following article. (29a)
Art. 41. For civil purposes, the fetus is considered born if it is alive at the time it is completely delivered from the mother's womb. However, if the fetus had an intra-uterine life of less than seven months, it is not deemed born if it dies within twenty-four hours after its complete delivery from the maternal womb. (30a)
Art. 42. Civil personality is extinguished by death.
The effect of death upon the rights and obligations of the deceased is determined by law, by contract and by will. (32a)
Art. 43. If there is a doubt, as between two or more persons who are called to succeed each other, as to which of them died first, whoever alleges the death of one prior to the other, shall prove the same; in the absence of proof, it is presumed that they died at the same time and there shall be no transmission of rights from one to the other. (33)
Second, the criminal part. Book Two, Title Eight, Chapter One, Section Two, of the Revised Penal Code, pertaining to infanticide and abortion, is as follows:
Section Two.  Infanticide and abortion.
Art. 255. Infanticide.  The penalty provided for parricide in Article 246 and for murder in Article 248 shall be imposed upon any person who shall kill any child less than three days of age.
If the crime penalized in this article be committed by the mother of the child for the purpose of concealing her dishonor, she shall suffer the penalty of prision correccional in its medium and maximum periods, and if said crime be committed for the same purpose by the maternal grandparents or either of them, the penalty shall be prision mayor.
Art. 256. Intentional abortion.  Any person who shall intentionally cause an abortion shall suffer:
1. The penalty of reclusion temporal, if he shall use any violence upon the person of the pregnant woman.
2. The penalty of prision mayor if, without using violence, he shall act without the consent of the woman.
3. The penalty of prision correccional in its medium and maximum periods, if the woman shall have consented.
Art. 257. Unintentional abortion.  The penalty of prision correccional in its minimum and medium period shall be imposed upon any person who shall cause an abortion by violence, but unintentionally.
Art. 258. Abortion practiced by the woman herself of by her parents.  The penalty of prision correccional in its medium and maximum periods shall be imposed upon a woman who shall practice abortion upon herself or shall consent that any other person should do so.
Any woman who shall commit this offense to conceal her dishonor, shall suffer the penalty of prision correccional in its minimum and medium periods.
If this crime be committed by the parents of the pregnant woman or either of them, and they act with the consent of said woman for the purpose of concealing her dishonor, the offenders shall suffer the penalty of prision correccional in its medium and maximum periods.
Art. 259. Abortion practiced by a physician or midwife and dispensing of abortives.  The penalties provided in Article 256 shall be imposed in its maximum period, respectively, upon any physician or midwife who, taking advantage of their scientific knowledge or skill, shall cause an abortion or assist in causing the same.
Any pharmacist who, without the proper prescription from a physician, shall dispense any abortive shall suffer arresto mayor and a fine not exceeding 1,000 pesos.
From the provisions of the New Civil Code and the Revised Penal Code, it is conclusive that abortion is frowned upon because "the conceived child shall be considered born for all purposes that are favorable to it" (Art. 40, New Civil Code). This means that the child is already considered a living person even if it is still in the womb, therefore, since killing a person, unless justified (i.e. self-defense, to save the mother), is inherently evil (mala in se), then it contravenes the Natural Law which everyone understands. Also, to prevent abortion, our lawmakers even made provisions to criminally punish acts of abortion, which is clearly a crime against persons (Book Two, Title Eight, Chapter One, Section Two, Revised Penal Code).