What Google AI says about second trimester miscarriages

Second-trimester miscarriages (occurring between 13 and 24 weeks) are typically caused by maternal health conditions, structural issues with the uterus or cervix, or placental problems, rather than the chromosomal abnormalities that cause most first-trimester losses.
Specific causes can include:
Cervical Insufficiency (Weak Cervix):
When the cervix is weak or has been damaged, it can begin to open too early in the pregnancy, leading to miscarriage.
Uterine & Placental Issues:
Problems with how the placenta forms, placental abruption, or uterine conditions (like fibroids or a septate uterus) can disrupt fetal development.
Maternal Health Conditions:
Unmanaged or poorly controlled chronic conditions such as high blood pressure, diabetes, lupus, or thyroid disease significantly increase risk.
Blood Clotting Disorders:
Conditions like Antiphospholipid Syndrome (APS) can cause blood clots to form in the placenta, cutting off vital nutrients and oxygen to the baby.
Infections:
Uterine infections or maternal infections (like parvovirus or cytomegalovirus) can cause inflammation or trigger early labor.
Fetal Structural Abnormalities:
While less common than in the first trimester, certain structural or genetic defects can still cause the baby to stop developing.