The Buddha taught us not to involve in killings. In Parajikapali (a part of the Buddha’s teachings included in the discipline part which is known as the Vinaya Pitaka), the Buddha has taught us that it is a sin to kill even one day lasted pregnancy. In fact, Supreme Buddha is the first teacher who made a voice objecting the abortions about 2553 years ago. Thus, you could imagine how marvelous the Buddhism is.