What is the common cause of a miscarriage during the 1st and 2nd trimester?
What most commonly causes a miscarriage is a glitch in the foetus’s genes. According to March of Dimes (a United States nonprofit organization that works to improve the health of mothers and babies), this is the cause of up to 70% of miscarriages in the first trimester. A glitch in a foetus’s genes is also what causes 20% of miscarriages in the second trimester.
During fertilization, the sperm and egg each bring 23 chromosomes together to create perfectly matched pairs. This is a complex process, and a minor glitch can result in a genetic or chromosomal abnormality.
Scientific research has revealed that some couples struggle with miscarriage because of genes they carry and can pass to their embryos.