Induced Approximately 205 million pregnancies occur each year worldwide. Over a third are unintended and about a fifth end in induced<unk> . Most<unk> s result from unintended pregnancies. In the United Kingdom, 1 to 2% of<unk> s are done due to genetic problems in the fetus. A pregnancy can be intentionally aborted in several ways. The manner selected often depends upon the gestational age of the embryo or fetus, which increases in size as the pregnancy progresses. Specific procedures may also be selected due to legality, regional availability, and doctor or a woman's personal preference. Reasons for procuring induced<unk> s are typically characterized as either therapeutic or elective. An<unk>  is medically referred to as a therapeutic<unk>  when it is performed to save the life of the pregnant woman; to prevent harm to the woman's physical or mental health; to terminate a pregnancy where indications are that the child will have a significantly increased chance of mortality or morbidity; or to selectively reduce the number of fetuses to lessen health risks associated with multiple pregnancy. An<unk>  is referred to as an elective or voluntary<unk>  when it is performed at the request of the woman for non-medical reasons. Confusion sometimes arises over the term "elective" because "elective surgery" generally refers to all scheduled surgery, whether medically necessary or not. Spontaneous Miscarriage, also known as spontaneous<unk> , is the unintentional expulsion of an embryo or fetus before the 24th week of gestation. A pregnancy that ends before 37 weeks of gestation resulting in a live-born infant is a "premature birth" or a "preterm birth". When a fetus dies in utero after viability, or during delivery, it is usually termed "stillborn". Premature births and stillbirths are generally not considered to be miscarriages, although usage of these terms can sometimes overlap. Only 30% to 50% of conceptions progress past the first trimester. The vast majority of those that do not progress are lost before the woman is aware of the conception, and many pregnancies are lost before medical practitioners can detect an embryo. Between 15% and 30% of known pregnancies end in clinically apparent miscarriage, depending upon the age and health of the pregnant woman. 80% of these spontaneous<unk> s happen in the first trimester. The most common cause of spontaneous<unk>  during the first trimester is chromosomal abnormalities of the embryo or fetus, accounting for at least 50% of sampled early pregnancy losses. Other causes include vascular disease (such as lupus), diabetes, other hormonal problems, infection, and abnormalities of the uterus. Advancing maternal age and a woman's history of previous spontaneous<unk> s are the two leading factors associated with a greater risk of spontaneous<unk> . A spontaneous<unk>  can also be caused by accidental trauma; intentional trauma or stress to cause miscarriage is considered induced<unk>  or feticide.
Abortion
Hysterotomy abortion
Instillation abortion
Superfecundation
Postpartum confinement
Hormonal IUDs
Intrauterine device
Natural childbirth