We all hear a lot of things about what causes miscarriages and what doesn't. And much of the information available is confusing at best and harmful at worst. In fact, it's estimated that as many as 26% of all pregnancies end in miscarriage, with the likelihood increasing with advancing age."Much misinformation is shared among women or passed down from older generations," says Jonathan Schaffir, MD, an assistant professor of obstetrics and gynaecology at Ohio State University College of Medicine.According to Dr. Ankita Chandna, Director of Obstetrics and Gynaecology at Max Super Speciality Hospital, Shalimar Bagh, Delhi several medical factors can lead to miscarriage. “Chromosomal abnormalities, maternal diseases, and certain infections are significant causes,” she explains. She adds that an abnormal number of chromosomes during fertilization can prevent the embryo from developing properly, leading to pregnancy loss. Additionally, maternal age plays a critical role, with the risk rising from 1 in 5 pregnancies by age 30 to 1 in 2 by age 40.Dr. Chandna also emphasizes the importance of identifying blood clotting disorders, which can disrupt placental circulation, leading to early or late miscarriages. Conditions such as antiphospholipid syndrome (APS), thrombophilia, and systemic lupus erythematosus (SLE) are common culprits. "Blood clotting disorders are causes of both early and late miscarriages and can also lead to recurrent losses," she notes.Other potential causes include cervical insufficiency, developmental issues in the fetus, fibroids, hormonal imbalances, lifestyle factors such as smoking and excessive caffeine intake, and multiple pregnancies. Dr. Chandna also points out that placental abnormalities and certain uterine shapes, like a heart-shaped or septate uterus, can heighten the risk of miscarriage.What Doesn't Cause A Miscarriage?There are many reasons that can lead to a miscarriage, but several myths continue to circulate, causing unnecessary stress and guilt. Here are four things that do not cause miscarriages, according to experts.Moderate Exercise: Exercising or picking up a reasonably heavy object, such as a grocery bag or a toddler, is unlikely to cause a miscarriage. In fact, the American College of Obstetricians and Gynecologists (ACOG) states that exercise during pregnancy, with a doctor’s approval, can be beneficial.Abortion: While some studies suggest a slightly increased risk of miscarriage in people who had previously terminated a pregnancy, the evidence overwhelmingly indicates that elective abortion is safe and not linked to future pregnancy loss.A large study published in The New England Journal of Medicine found that elective medical abortion was not associated with an increased risk of subsequent miscarriage. However, any increased risk appears to be limited to those who experienced complications like severe infection or uterine scarring after a surgical abortion.Everyday Stress: While some studies on stress and miscarriage are conflicting, everyday tension or anxiety—like tight deadlines at work or worries about labor—have not been conclusively linked to pregnancy loss. According to Dr. Schaffir, even extreme stress, such as the death of a loved one, is not strongly associated with miscarriage.Foods Themselves: Foods don't cause miscarriages directly, but certain foods carry higher risks of food-borne illnesses like listeriosis, which have been linked to pregnancy complications. The Food and Drug Administration (FDA) recommends that pregnant people avoid raw meat and fish, unpasteurized cheeses, and deli meat due to the risk of food poisoning from bacteria like Listeria, Salmonella, and E. coli.Dr. Chandna also highlights that eating a balanced diet, maintaining good hydration, and practicing relaxation techniques like yoga and meditation are essential in reducing stress and promoting overall health during pregnancy. “Routine antenatal visits, proper sleep, and following the doctor’s advice on safe medications are crucial,” she advises.Sex During PregnancyGenerally, all kinds of sex and sexual acts, including the use of sex toys, are considered safe during pregnancy. The fetus is protected by amniotic fluid and the strong muscles of the uterine walls. However, if the pregnancy is high-risk, or if there are concerns about pre-term labor or other complications, it’s best to consult with a healthcare provider.Understanding what truly causes and doesn't cause miscarriages can help dispel misconceptions and alleviate unnecessary stress for those navigating the challenges of pregnancy.