Senior Consultant, Medical Genetics, Artemis Hospitals, Gurgaon, India
Part 6 of 12 in Finding Answers in Recurrent Pregnancy Loss
Antiphospholipid Antibody Syndrome: Diagnosis and Treatment
June 7, 2026
Antiphospholipid antibody syndrome requires meeting both a clinical and a laboratory criterion before diagnosis. Clinically: a history of vascular or deep vein thrombosis, or an obstetric history of three or more unexplained losses under 10 weeks, one or more losses at or beyond 10 weeks, or a preterm birth from placental insufficiency or severe pre-eclampsia. On the lab side, three antibodies are checked: anticardiolipin, lupus anticoagulant, and beta-2 glycoprotein, for both IgM and IgG, with levels above the 99th percentile confirmed positive on two occasions 12 weeks apart.
Testing must wait at least 6 weeks after a pregnancy loss, since the physiological changes that follow a loss can produce false positives. Once diagnosed, treatment starts with low-dose aspirin in the preconception period, before a woman is actively trying to conceive; once pregnancy is confirmed, prophylactic heparin is added and continued through the pregnancy.
This guide is based on a live Jivo Masterclass — Dr. Kanika Singh taught doctors across Africa on June 7, 2026.
FROM THE LIVE Q&A
Dr. Agbogus Stanley
For patients with PCOS, how long should metformin be taken before conception and after conception?
Dr. Kanika Singh
Metformin should be started at least 2 to 3 months before conception. It is safe to continue in pregnancy and is generally continued through the first trimester and sometimes beyond. It should be monitored with GTT as well as regular HbA1c and blood sugar checks throughout.
Frequently Asked Questions
My question is about sperm collection. In my clinic I often see couples where the male is over 50 years old. What are the chances of getting good quality sperm, and what are the implications for implantation?▼
I will not be able to give you details about specific sperm selection procedures, as in our hospital this is a multidisciplinary process involving the IVF specialist and the andrology laboratory. But in terms of the genetic implications: above the age of 50, there is a high chance that sperm quality is reduced, and the sperm DNA fragmentation index is likely to be elevated. Unless we specifically test for it, we do not know the exact level, but even without testing, there is a significant chance that sperm DNA quality is impaired, which can result in recurrent pregnancy loss or implantation failure. Testing the sperm DNA fragmentation index in men above 50 with a history of recurrent pregnancy loss or implantation failure would be worthwhile.
For patients with PCOS, how long should metformin be taken before conception and after conception?▼
Metformin should be started at least 2 to 3 months before conception. It is safe to continue in pregnancy and is generally continued through the first trimester and sometimes beyond. It should be monitored with GTT as well as regular HbA1c and blood sugar checks throughout.
What criteria must be met to diagnose antiphospholipid antibody syndrome?▼
Diagnosis requires meeting both a clinical and a laboratory criterion.
What obstetric history qualifies for the clinical criteria of antiphospholipid antibody syndrome?▼
Three or more unexplained losses under 10 weeks, one or more losses at or beyond 10 weeks, or a preterm birth from placental insufficiency or severe pre-eclampsia, alongside a history of vascular or deep vein thrombosis.
Which antibodies confirm an antiphospholipid antibody syndrome diagnosis?▼
Anticardiolipin, lupus anticoagulant, and beta-2 glycoprotein, tested for both IgM and IgG, with levels above the 99th percentile confirmed positive on two occasions 12 weeks apart.
Why must antiphospholipid antibody testing wait after a pregnancy loss?▼
Testing must wait at least 6 weeks after a pregnancy loss, since the physiological changes that follow a loss can produce false positives.
How is antiphospholipid antibody syndrome treated during pregnancy?▼
Treatment starts with low-dose aspirin in the preconception period; once pregnancy is confirmed, prophylactic heparin is added and continued through the pregnancy.
In This Series: Finding Answers in Recurrent Pregnancy Loss
- 1.Finding Answers in Recurrent Pregnancy Loss
- 2.Fetal Chromosomal Abnormalities: The Leading Cause of First-Trimester Loss
- 3.Balanced Translocation: When a Genetically Normal Parent Passes on Recurrent Loss
- 4.Single-Gene Causes: Why Second-Trimester Losses Need a Different Genetic Workup
- 5.Anatomical Causes: Uterine Septum, Fibroids, and Cervical Incompetence
- 6.Antiphospholipid Antibody Syndrome: Diagnosis and Treatment
- 7.Endocrine Causes: Thyroid, PCOS, and Diabetes in Recurrent Pregnancy Loss
- 8.Sperm DNA Fragmentation: The Male Factor in Recurrent Pregnancy Loss
- 9.The Immunological Debate: NK Cells, TNF-Alpha, and IVIG Therapy
- 10.What to Test For: A Practical Investigation Framework by Trimester
- 11.Pre-Implantation Genetic Testing: PGT-A, PGT-M, PGT-SR and PGT-HLA Explained
- 12.Prognosis After Recurrent Pregnancy Loss: Why the Outlook Is Better Than Most Couples Expect