Antiphospholipid syndrome (APS, often called APLA after the antibodies) is an autoimmune condition in which the blood clots more easily. In pregnancy it can affect the placenta, and it is linked with recurrent miscarriage, pre-eclampsia, a small baby and stillbirth. Systemic lupus erythematosus (SLE, lupus) is a related autoimmune disease that affects the joints, skin, kidneys and blood, and APLA antibodies are found in about a third of women with lupus.
Both conditions are compatible with a healthy pregnancy. With aspirin and heparin, live birth rates in obstetric APLA rise to around 70–80%, and most women with well-controlled lupus have a good outcome. What makes the difference is planning: confirming the diagnosis correctly, choosing pregnancy-safe medicines in advance, and watching the placenta and the baby’s growth closely.
Dr. Devang Patel, FNB in High Risk Pregnancy & Perinatology, manages APLA and lupus pregnancies at Divine Women’s Hospital, Gota, Ahmedabad, working alongside your rheumatologist or physician where you already have one. Consultations are in Gujarati, Hindi or English.
What APLA and lupus do in pregnancy
In APLA, antibodies act on the lining of blood vessels and on the developing placenta, causing inflammation and small clots. This can reduce placental blood flow, which is why problems often show up as early losses, severe pre-eclampsia or a baby who stops growing well.
Lupus affects pregnancy in different ways. Active disease, particularly kidney involvement (lupus nephritis), raises the chance of pre-eclampsia, preterm birth and growth restriction. Some women with lupus or Sjögren’s syndrome carry anti-Ro or anti-La antibodies, which can affect the baby’s heart rhythm.
Pregnancy itself also raises clotting tendency, peaking in the weeks after birth. In a woman whose blood already clots more easily, that combination is why heparin often continues for six weeks after delivery, and why dehydration, long journeys and immobility are avoided.
How the diagnosis is confirmed
A diagnosis of antiphospholipid syndrome needs both a qualifying clinical event and persistently positive antibodies. A single positive test, or a weakly positive one, is not enough - antibodies can be temporarily positive after viral infections, and many women are labelled APLA on incomplete evidence and treated unnecessarily.
- Clinical history: three or more consecutive miscarriages before 10 weeks, a loss of a normal baby after 10 weeks, a birth before 34 weeks due to severe pre-eclampsia or placental insufficiency, or a confirmed blood clot
- Laboratory tests: lupus anticoagulant, anticardiolipin antibodies (IgG/IgM, medium or high titre) and anti-beta-2 glycoprotein I antibodies
- Persistence: the positive result confirmed on repeat testing at least 12 weeks apart
- Triple-positive women (all three tests positive) and those with lupus anticoagulant carry the highest risk
- For lupus, baseline tests include blood counts, kidney function, urine protein, complement levels (C3, C4), anti-dsDNA, and anti-Ro/La antibodies
Planning before conception
- Aim to conceive when lupus has been quiet for at least six months, which roughly halves the risk of a flare
- Continue hydroxychloroquine - it is safe in pregnancy, reduces flares and may lower the risk of heart block in the baby
- Mycophenolate, methotrexate and leflunomide are stopped and replaced (with azathioprine or tacrolimus if needed) at least three months before trying
- Women on warfarin are switched to heparin as soon as a pregnancy test is positive, and before 6 weeks, because warfarin can affect the baby’s bones and face between 6 and 12 weeks
- Start folic acid and check vitamin D, thyroid, BP and kidney function
- Discuss whether oestrogen-containing pills should be avoided for contraception in the meantime, as they raise clot risk in APLA
Treatment in pregnancy
Treatment depends on your history. Low molecular weight heparin (LMWH), such as enoxaparin, does not cross the placenta and is given as a once- or twice-daily injection under the skin. You or a family member are taught to give it at home, and bruising at the site is common and harmless.
| Situation | Usual treatment | Duration |
|---|---|---|
| Antibodies positive, no clinical events | Low-dose aspirin, sometimes alone | From 12 weeks (or earlier) to about 36 weeks |
| Obstetric APLA (recurrent loss or late loss) | Aspirin plus preventive-dose LMWH | Aspirin before conception; LMWH from a positive test until 6 weeks after birth |
| Previous preterm birth from placental disease | Aspirin plus preventive-dose LMWH, close growth scans | Through pregnancy and 6 weeks postnatally |
| Previous blood clot (thrombotic APLA) | Aspirin plus treatment-dose LMWH; warfarin replaced | Through pregnancy, then back to long-term anticoagulation |
| Lupus without APLA | Hydroxychloroquine and aspirin for pre-eclampsia prevention | Hydroxychloroquine continued throughout and after birth |
Never stop hydroxychloroquine on your own when you find out you are pregnant - stopping it is a common trigger for a lupus flare.
Monitoring mother and baby
Because both conditions can affect the placenta, a written scan plan is followed: an early dating scan, the NT scan with pre-eclampsia screening, a detailed anomaly scan with uterine artery Doppler around 20–24 weeks, then growth scans with umbilical artery Doppler every two to four weeks in the third trimester.
BP and urine are checked at each visit. In lupus, blood counts, kidney function, urine protein, complement and anti-dsDNA are repeated each trimester. These help distinguish a lupus flare from pre-eclampsia, which can look similar but are treated differently - flares with steroids or immunosuppressants, pre-eclampsia by timing delivery.
If you carry anti-Ro or anti-La antibodies, the baby’s heart rhythm is checked on scan, typically every one to two weeks between about 16 and 26 weeks. Congenital heart block affects about 2% of babies of anti-Ro positive mothers, and around 15–20% if a previous baby was affected.
Possible complications and how they are reduced
- Pre-eclampsia: aspirin from early pregnancy, BP monitoring and calcium supplementation
- Fetal growth restriction: serial growth and Doppler scans, with timed delivery if growth slows
- Blood clots in the mother: heparin through pregnancy and for six weeks after birth, when clot risk is highest
- Lupus flare: hydroxychloroquine, regular blood tests and early rheumatology input
- Low platelets: monitored regularly, as they influence heparin dosing and anaesthesia
- Bone thinning with long-term heparin or steroids: calcium and vitamin D supplements
Delivery and after the birth
Delivery is usually planned at term, around 38–39 weeks, if mother and baby are well, and earlier if growth or BP is a concern. Many women have a vaginal birth. Heparin is timed so that an epidural or spinal can be given safely: a preventive dose is stopped about 12 hours and a treatment dose about 24 hours beforehand, and injections restart a few hours after birth.
Heparin, warfarin (after delivery) and hydroxychloroquine are all compatible with breastfeeding. Babies of anti-Ro positive mothers are checked for neonatal lupus rash and heart rhythm. For women with APLA, long-term follow-up with a physician or rheumatologist is advised, as there is a lifelong increase in clot risk, and future pregnancies follow the same planned approach from the start.
How your care is organised at Divine Women’s Hospital
Dr. Devang Patel reviews your previous reports, scans and discharge summaries at the first consultation, ideally before you conceive, and writes a plan covering medicines, heparin start date, scan schedule and blood tests for each trimester. If you already see a rheumatologist or physician, the plan is shared with them so advice stays consistent.
Growth and Doppler scans are performed and reported by Dr. Patel himself, so results are discussed in the same visit. Delivery takes place at the NABH-accredited hospital in Gota, with 24×7 labour care, anaesthesia and neonatal support, and the postnatal heparin and contraception plan is agreed before you go home.
Your care, step by step
- Confirm the diagnosisAntibody reports and past history are reviewed, and repeat tests at a 12-week gap are arranged if needed.
- Pre-conception planMedicines are made pregnancy-safe with your rheumatologist, and aspirin and heparin timing is agreed in advance.
- Early pregnancy startHeparin begins as soon as the test is positive, with injection teaching and an early viability scan.
- Treatment and scansDoppler, growth scans, BP and lupus blood tests follow a written week-by-week plan.
- Delivery and afterHeparin is paused safely for birth at Divine Women’s Hospital, then continued for about six weeks.
When to book a visit
- You have tested positive for APLA antibodies or have been diagnosed with lupus or Sjögren’s syndrome
- You have had three or more miscarriages, a loss after 10 weeks, or a stillbirth
- A previous pregnancy had early severe pre-eclampsia or a very small baby
- You have had a blood clot in a leg, lung or brain
- You are on warfarin, mycophenolate or methotrexate and planning pregnancy
- You are anti-Ro or anti-La positive and pregnant or planning
Warning signs - get same-day care
- Painful swelling of one leg, or sudden chest pain and breathlessness
- Severe headache, blurred vision or upper abdominal pain
- Reduced or changed baby movements
- Vaginal bleeding or fluid leaking
- A new rash, joint swelling, high fever or frothy urine suggesting a lupus flare
Labour and emergency care are available 24 × 7. Call the hospital and come in directly.
Myths and facts
Myth: One positive APLA test means I need heparin in every pregnancy.
A diagnosis needs a qualifying clinical history and antibodies that stay positive 12 weeks apart. Many single positive tests are temporary.
Myth: Hydroxychloroquine should be stopped in pregnancy.
Hydroxychloroquine is safe in pregnancy and breastfeeding, and stopping it raises the chance of a lupus flare.
Myth: Women with lupus should not get pregnant.
Most women with lupus can have a healthy pregnancy, especially when the disease has been quiet for six months and care is planned in advance.
Myth: Heparin injections thin the baby’s blood.
Low molecular weight heparin does not cross the placenta, so it does not affect the baby’s clotting.
Frequently asked questions
Can I have a normal pregnancy with APLA?
Yes. With aspirin and heparin and careful monitoring, most women with obstetric APLA go on to have a live baby. Close watching for pre-eclampsia and growth problems remains important even with treatment.
Are heparin injections safe for the baby?
Yes. Low molecular weight heparin does not cross the placenta and is considered safe for the baby. Bruising at the injection site is common and harmless.
How long do I need to take heparin injections?
Usually throughout pregnancy and for about six weeks after delivery, because the risk of clots is highest in the weeks after birth.
What is the APLA profile test?
It usually means three tests: lupus anticoagulant, anticardiolipin antibodies and anti-beta-2 glycoprotein I antibodies. Lupus anticoagulant is ideally tested when you are not on heparin or warfarin, as these can interfere with the result.
Does lupus get worse during pregnancy?
Lupus can flare in pregnancy or after birth, but the risk is much lower when the disease has been inactive for six months before conception and hydroxychloroquine is continued.
What is congenital heart block and should I worry?
It is a slowing of the baby’s heart rhythm caused by anti-Ro or anti-La antibodies crossing the placenta. It affects about 2 in 100 babies of antibody-positive mothers. Regular heart rhythm checks between 16 and 26 weeks allow early detection.
Can I breastfeed while taking heparin or hydroxychloroquine?
Yes. Heparin, warfarin (after delivery) and hydroxychloroquine are all compatible with breastfeeding. Other lupus medicines are reviewed individually.
Can I have an epidural if I am on heparin?
Usually, yes, with careful timing. A preventive dose is generally stopped about 12 hours, and a treatment dose about 24 hours, before an epidural or spinal anaesthetic. You will be told to stop injections when labour starts or the night before a planned delivery.
I tested APLA positive after one miscarriage. Do I need heparin?
Usually not on that basis alone. A single early miscarriage is common and does not meet the criteria for antiphospholipid syndrome. The test is repeated after 12 weeks and your full history reviewed; low-dose aspirin may still be suggested in some situations, but heparin is reserved for women who truly meet the criteria.
Is lupus passed on to the baby?
Lupus itself is not directly inherited, although family members have a slightly higher tendency to autoimmune conditions. Anti-Ro antibodies can cause temporary neonatal lupus, usually a rash that fades within a few months, and rarely heart block, which is why heart rhythm checks are done in pregnancy.