Abortion is defined as the expulsion of products of conception from the uterus before the fetus is viable. An abortion can occur spontaneously due to complications during pregnancy, or can be induced. The term abortion most commonly refers to the induced abortion of a human pregnancy, while spontaneous abortions are usually referred to as miscarriages.
Uavyaji mimba hufafanuliwa kama utupaji wa bidhaa za utungaji mimba kutoka kwa uterasi kabla ya fetusi kuwa hai. Utoaji mimba unaweza kutokea kwa hiari kutokana na matatizo wakati wa ujauzito, au unaweza kusababishwa. Neno uavyaji mimba kwa kawaida hurejelea utoaji mimba uliosababishwa wa mimba ya binadamu, wakati utoaji mimba wa papo hapo kwa kawaida hurejelewa kama kuharibika kwa mimba.