Baby aborted at 22 weeks An abortion is the termination of a pregnancy by the removal or expulsion from the uterus of a fetus or embryo.An abortion can occur spontaneously due to complications during pregnancy or can be induced, in humans and other species. In the context of human pregnancies, an abortion induced to preserve the health of the gravida (pregnant female) is termed a therapeutic abortion, while an abortion induced for any other reason is termed an elective abortion. The term abortion most commonly refers to the induced abortion of a human pregnancy, while spontaneous abortions are usually termed miscarriages.
Abortion has a long history and has been induced by various methods including herbal abortifacients, the use of sharpened tools, physical trauma and other traditional methods. Contemporary medicine utilizes medications and surgical procedures to induce abortion. The legality, prevalence, and cultural views on abortion vary substantially around the world. In many parts of the world there is prominent and divisive public controversy over the ethical and legal issues of abortion. Abortion and abortion-related issues feature prominently in the national politics in many nations often involving the opposing pro-life and pro-choice worldwide social movements. Incidence of abortion has declined worldwide, as access to family planning education and contraceptive services has increased. Abortion incidence in the United States declined 8% from 1996 to 2003.
Abortion has a long history and has been induced by various methods including herbal abortifacients, the use of sharpened tools, physical trauma and other traditional methods. Contemporary medicine utilizes medications and surgical procedures to induce abortion. The legality, prevalence, and cultural views on abortion vary substantially around the world. In many parts of the world there is prominent and divisive public controversy over the ethical and legal issues of abortion. Abortion and abortion-related issues feature prominently in the national politics in many nations often involving the opposing pro-life and pro-choice worldwide social movements. Incidence of abortion has declined worldwide, as access to family planning education and contraceptive services has increased. Abortion incidence in the United States declined 8% from 1996 to 2003.
Spontaneous aborton
A complete spontaneous abortion at about six weeks from conception, i.e. eight weeks from LMP
Spontaneous abortion (also known as miscarriage) is the expulsion of an embryo or fetus due to accidental trauma or natural causes before approximately the 22nd week of gestation; the definition by gestational age varies by country.Most miscarriages are due to incorrect replication of chromosomes; they can also be caused by environmental factors. A pregnancy that ends before 37 weeks of gestation resulting in a live-born infant is known as a "premature birth". When a fetus dies in utero after about 22 weeks, 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.
Between 10% and 50% of pregnancies end in clinically apparent miscarriage, depending upon the age and health of the pregnant woman. Most miscarriages occur very early in pregnancy, in most cases, they occur so early in the pregnancy that the woman is not even aware that she was pregnant. One study testing hormones for ovulation and pregnancy found that 61.9% of conceptuses were lost prior to 12 weeks, and 91.7% of these losses occurred subclinically, without the knowledge of the once pregnant woman.
The risk of spontaneous abortion decreases sharply after the 10th week from the last menstrual period (LMP).One study of 232 pregnant women showed "virtually complete [pregnancy loss] by the end of the embryonic period" (10 weeks LMP) with a pregnancy loss rate of only 2 percent after 8.5 weeks LMP.
The most common cause of spontaneous abortion during the first trimester is chromosomal abnormalities of the embryo/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.[8] Advancing maternal age and a patient history of previous spontaneous abortions are the two leading factors associated with a greater risk of spontaneous abortion. A spontaneous abortion can also be caused by accidental trauma; intentional trauma or stress to cause miscarriage is considered induced abortion or feticide.
A complete spontaneous abortion at about six weeks from conception, i.e. eight weeks from LMP
Spontaneous abortion (also known as miscarriage) is the expulsion of an embryo or fetus due to accidental trauma or natural causes before approximately the 22nd week of gestation; the definition by gestational age varies by country.Most miscarriages are due to incorrect replication of chromosomes; they can also be caused by environmental factors. A pregnancy that ends before 37 weeks of gestation resulting in a live-born infant is known as a "premature birth". When a fetus dies in utero after about 22 weeks, 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.
Between 10% and 50% of pregnancies end in clinically apparent miscarriage, depending upon the age and health of the pregnant woman. Most miscarriages occur very early in pregnancy, in most cases, they occur so early in the pregnancy that the woman is not even aware that she was pregnant. One study testing hormones for ovulation and pregnancy found that 61.9% of conceptuses were lost prior to 12 weeks, and 91.7% of these losses occurred subclinically, without the knowledge of the once pregnant woman.
The risk of spontaneous abortion decreases sharply after the 10th week from the last menstrual period (LMP).One study of 232 pregnant women showed "virtually complete [pregnancy loss] by the end of the embryonic period" (10 weeks LMP) with a pregnancy loss rate of only 2 percent after 8.5 weeks LMP.
The most common cause of spontaneous abortion during the first trimester is chromosomal abnormalities of the embryo/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.[8] Advancing maternal age and a patient history of previous spontaneous abortions are the two leading factors associated with a greater risk of spontaneous abortion. A spontaneous abortion can also be caused by accidental trauma; intentional trauma or stress to cause miscarriage is considered induced abortion or feticide.
Induced abortion
A pregnancy can be intentionally aborted in many ways. The manner selected depends chiefly upon the gestational age of the embryo or fetus, which increases in size as it ages. Specific procedures may also be selected due to legality, regional availability, and doctor-patient preference. Reasons for procuring induced abortions are typically characterized as either therapeutic or elective. An abortion is medically referred to as therapeutic when it is performed to:
save the life of the pregnant woman;
preserve the woman's physical or mental health;
terminate pregnancy that would result in a child born with a congenital disorder that would be fatal or associated with significant morbidity; or
selectively reduce the number of fetuses to lessen health risks associated with multiple pregnancy.
An abortion is referred to as elective when it is performed at the request of the woman "for reasons other than maternal health or fetal disease."
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