1. What is pregnancy biochemistry? 2. What are the biochemical symptoms of pregnancy? 3. What are the biochemical causes of pregnancy? 4. How to prevent and treat pregnancy biochemistry? 1. What is pregnancy biochemistry? Pregnancy biochemistry, also known as early miscarriage, refers to spontaneous abortion due to chromosomal abnormalities or abnormal embryonic development shortly after the fertilized egg implants, causing the embryo to stop developing. This condition usually occurs between 6 weeks and 12 weeks after conception. Although this situation is relatively common, it can still bring great shock and psychological pressure to couples who want to have a baby.