Abortion refers to the spontaneous or intentional termination of pregnancy before the fetus reaches sufficient development to sustain life. Conventionally, abortion is defined as the termination of pregnancy before the 20th week of pregnancy or a birth weight of less than 500 g (
1,
2). Spontaneous abortion is the most common complication during pregnancy, with a prevalence of 15 - 20% (
1). Additionally, studies using sensitive human chorionic gonadotropin (HCG) measurement methods indicate that the actual rate of pregnancy loss after implantation is 31%. Among clinically identified pregnancies, 15% end in abortion before the 20th week of pregnancy (measured from the last menstrual cycle) (
2).
Studies have shown that abortion can result in depression, anxiety, severe post-abortion distress, suicide attempts, drug use, obsessive-compulsive disorder, and marital discord (
3-
6). This depression exhibits symptoms similar to those of typical depression, including a sad mood, worry, discomfort, impatience, loss of appetite, lack of desire for life, and sleep disturbances. It can also manifest more severe symptoms, necessitating serious and preventive measures (
1,
7). Depression is characterized by a persistently depressed mood for at least two weeks, including feelings of emptiness, worthlessness, lack of mastery over the environment, and emotional stimulation. It is often accompanied by sadness, indifference, lack of interest and motivation, motor slowness or agitation, fatigue, impaired concentration and decision-making, feelings of shame or guilt, and death-related thoughts (
8).
Recent evidence indicates that more than half of women experience various mental and emotional complications in the weeks and months following abortion (
2). While post-abortion grief usually decreases within 3 - 4 months, it can persist for up to a year (
1,
9). In some cases, it can lead to clinical depression requiring treatment (
10). Symptoms of anxiety and depression following abortion may continue until the next pregnancy. Given that many women become pregnant again within 18 months after abortion, the psychological impact of spontaneous abortion on subsequent pregnancies is significant. Pregnant women with a history of spontaneous abortion within the previous year are more prone to psychological symptoms and pregnancy-related distress, including anxiety, depression, physical disorders, obsession, interpersonal sensitivity, psychoticism, suspicion, and hostility (
11,
12). Therefore, the depression, anxiety, and stress caused by abortion can have severe consequences for the health and condition of subsequent pregnancies.
Research has also found an association between antiphospholipid antibodies and headaches or migraines. Some studies have detected antiphospholipid antibodies in the blood and spinal fluid of patients with mental disorders (
13).
Given the high prevalence of abortion among women of reproductive age and the critical role of antiphospholipid syndrome (APS) in these abortions, as well as the existence of conflicting findings regarding psychological problems following abortion, including depression, further investigation is essential. Antiphospholipid syndrome is an acquired autoimmune disease that can lead to frequent blood clotting in the body’s vessels and pregnancy complications such as miscarriage, premature birth, and stillbirth. Notably, a pregnant individual may not have a history of thrombosis but may still experience pregnancy complications related to APS. Psychological pathologies diagnosed during pregnancy are key risk factors influencing adverse pregnancy outcomes (
14,
15).
Given that high levels of depression and guilt may persist in up to half of women following physical recovery, healthcare providers should recommend follow-up care for all post-abortion women (
16). However, few studies have been conducted in this area. The contradictions in previous studies, the high prevalence of depression among pregnant women, and the lack of research on the prevalence of depression due to APS highlight the need for further investigation.