Pregnant With POTS, hEDS or MCAS: What Changes, and Who to Loop In
If you live with POTS, hEDS or MCAS and pregnancy is somewhere on your mind — whether it's happening now or you're just starting to think about it — you deserve real, specific information, not vague reassurance or unnecessary alarm. Here's an honest, gentle starting point.
🌿 Before we go further
Tracking your symptoms before and during pregnancy gives your whole care team a clearer picture. Our free Daily Wellness Tracker is a gentle place to start.
💓 POTS during pregnancy
Pregnancy naturally increases blood volume by roughly 30 to 50 percent — which sounds like it should help POTS, and for some people, symptoms genuinely do improve as pregnancy progresses. For others, especially in the first trimester, symptoms can temporarily worsen before that extra blood volume kicks in, and the added cardiovascular demand of pregnancy is something worth monitoring closely with a doctor who understands dysautonomia. Neither pattern is more "normal" than the other — this is genuinely individual.
🦴 hEDS during pregnancy
The hormone relaxin, which loosens ligaments in preparation for childbirth, is already elevated during pregnancy in everyone — and in a body with hEDS, whose joints are already more lax to begin with, this can mean more pronounced joint instability, particularly in the pelvis and lower back. Joint protection strategies become especially relevant here, and a physiotherapist experienced with both hEDS and pregnancy can be a genuinely valuable addition to your care team, not just a nice-to-have.
🌸 MCAS during pregnancy
MCAS during pregnancy is less predictable than the other two — some people find their symptoms ease, thought to be related to naturally elevated cortisol during pregnancy having a stabilising effect on mast cells; others find pregnancy itself, or specific pregnancy-related hormonal shifts, becomes a new trigger. Medication management is a genuinely important conversation to have early, since some antihistamines and other MCAS medications have different safety profiles during pregnancy — this is not something to adjust on your own.
🩺 The specialists worth looping in early
A maternal-fetal medicine (MFM) specialist, particularly if your case is complex or you have more than one of these conditions — they specialise in higher-complexity pregnancies.
Your existing cardiologist or autonomic specialist, kept in the loop throughout, not just consulted once at the start.
A physiotherapist experienced with hEDS and pregnancy, ideally before symptoms become significant, for proactive joint support.
Your allergist or immunologist, specifically to review your MCAS medication plan for pregnancy safety before you need it urgently.
💬 A note on getting dismissed
Some people with these conditions report being told their concerns are "just normal pregnancy symptoms" when they're actually a genuine flare of an existing condition. You know your baseline better than anyone new meeting you during pregnancy. If something feels different from your usual pattern — not just uncomfortable, but different — it's worth saying so clearly and, if needed, more than once. The same self-advocacy scripts that help elsewhere apply here too.
💚 There's no single story here
Some people find pregnancy with these conditions surprisingly manageable. Others find it genuinely hard. Both are real, valid experiences — and neither one predicts the other for you specifically. Building your care team early is the thing most within your control.
One place for your whole care team 🌿
The Spoonie Planner helps you organise every diagnosis, medication and specialist note — so your obstetric team and your existing specialists are always working from the same clear picture.
❓ Frequently asked questions
Does POTS get better or worse during pregnancy?
Is it safe to have hEDS and be pregnant?
Can I take my MCAS medications while pregnant?
📚 Sources & further reading
The information in this article is drawn from the following sources. We encourage you to explore them, and to always discuss your specific situation with your own obstetric and specialist care team.
Dysautonomia International — Pregnancy and Dysautonomia
The Ehlers-Danlos Society — Living with EDS: Pregnancy Resources
Mast Cell Action — MCAS Resources
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✍️ Written with empathy by Emma at SpoonieToolkitStudio.
⚕️ This article is general information for the chronic illness community and is not medical advice. Pregnancy with a chronic illness should always be closely managed with your obstetric team and relevant specialists. Never start, stop, or adjust medication during pregnancy without medical guidance.