A few things really took up a disproportionate amount of our time & attention in 2020: Zoom, Mask Fashion & Gin based hand sanitiser. On a personal note I need to confess another: Iron. So while my one true (mineral) love remains zinc, iron answer hunting has infiltrated a lot of my days and some nights! There’s no hiding it…3 out of my 12 UU30 episodes this year have iron in the title 🙄 a sure sign its been on my and my mentees’ minds and sitting across the desk from a lot of health professionals in human form. And this affair I’ve been having, like most, started innocently… it started with a just a ‘quickie’, you know a quick question from a well meaning practitioner: “So, what’s expected in terms of ferritin levels across pregnancy?”
There are 2 answers to this.
The first reflects the practice guidelines for GPs and obstetricians in most western countries: > 30 mcg/L regardless of trimester
And then there’s another that is [ahem] evidence based, accounts for the essentiality of physiological anaemia in pregnancy &, naturally, trimester specific
There’s a big Fe-ar factor at play when it comes to answering the question, ‘Does this woman have enough iron for her and bub?’ Public health and practice guidelines appear to assume we are ‘guilty’ until proven innocent, patients are worried and health professionals are plagued with their own doubts about whether they’re ‘reading this right?!’ I’m sure we’ve all been in the situation where we feel our pregnant patient is doing well iron wise early in pregnancy, only for them to have that routine antenatal 28wk GP/Ob visit and discover a total panic has descended upon the patient and the rest of the health care team, with calls for ‘IV Iron STAT!’ But 28wks is the height of haemodilution right? You know, that time when ferritin, Hb and Hct should look at their lowest, right? There certainly is a limit to how low we want any pregnant woman to go – for her and her baby’s health but that limit is not the one routinely used and the truly evidenced based one is going to shock you. So what? What’s the issues if we are a little Fe-ar based about Fe, resulting in hypervigilance (calling a deficiency when there isn’t actually one) and giving them a ‘boost’ of more iron, surely this is good news ultimately for baby’s iron levels and for lactation and for…sorry what? No?
There’s a U shaped Curve for Iron supplementation & serum Ferritin levels in pregnant women?!!
Say it isn’t so!! But I can’t.🤐
Pregnancy Iron Balance – Sorting the ‘Normal’ from the ‘Noise’
It starts with a simple enough question: What should women’s ferritin levels be in pregnancy? But the answer will surprise many. There are in fact two. The first reflects the practice guidelines for GPs and obstetricians in most western countries regardless of trimester and then there’s another that is arguably more evidence based, accounts for the essentiality of physiological anaemia in pregnancy & is also, sensibly, trimester specific. To challenge the ‘noise’ and have the confidence that ‘normal’ is ‘enough’, we need to better understand the mother’s protective physiological adaptation of iron regulation and the intricate systems the foetus has to ensure its needs are met. This of course is not without limit, so we need to also be clear about the maternal serum ferritin threshold for negative impact on the foetus and newborn. Getting the balance or iron right in pregnancy for both mother and baby, is perhaps easier than we have been led to believe.
The latest Update in Under 30 has landed!!!