Dear Tom from exactly six months ago,

You're currently sitting in the windowless, overly warm scanning room at St Thomas' Hospital, entirely oblivious to the fact that your life is about to tilt on its axis. The NHS sonographer has just abruptly stopped making small talk about the miserable November rain. This, you'll soon learn, is the universal medical sign of impending doom. She is pressing the wand so hard into your wife’s stomach you’re mildly concerned she might puncture something, and the silence in the room is broken only by the sharp, repetitive clicking of the mouse as she measures the same tiny femur for the fourth time.

In about three minutes, the consultant is going to walk in, adjust his glasses, and use the phrase "intrauterine growth restriction." You're going to nod thoughtfully as if you've any earthly idea what that means, while secretly panicking about whether the twins at home have managed to set fire to the living room under the babysitter's watchful eye. Our surprise third child is apparently deciding to be a drama queen before she's even made an exit.

I’m writing to you from the other side of the neonatal intensive care unit trenches to save you a bit of the suffocating anxiety you're about to wade through. Put down your phone. Stop Googling right now.

The jargon avalanche and the placenta's tea break

The doctors are about to throw a lot of terrifying acronyms at you. They’ll talk about fundal height measuring behind, umbilical artery dopplers, and percentile charts that make you feel like your unborn child is already failing some sort of prenatal exam. Our paediatrician, a man who looked like he hadn't slept a full night since the late nineties, explained that our baby's condition was essentially a case of the placenta going on a permanent, unauthorised tea break.

Apparently, there are two flavours of this particular stress-inducer. There's the symmetrical kind, where the whole baby is just proportionally miniscule. Then there's the asymmetrical kind—which is what we drew from the medical lottery—where the tiny fetus smartly diverts all the remaining nutrients to its brain, leaving its abdomen looking like a slightly deflated balloon. It’s a brilliant survival mechanism, honestly, though it doesn't make the ultrasound images look any less bizarre. The medical staff will tell you this isn't anyone's fault, which your wife will immediately ignore as she mentally catalogues every cup of coffee she drank in the first trimester.

The kick count paranoia will consume you

You're about to enter a phase of life where fetal movement is your entire personality. You will find yourself staring at your wife’s belly with the unblinking intensity of a wildlife documentarian waiting for a snow leopard to appear. A sudden decrease in movement is the main red flag the doctors want you to watch for, which means every time the baby takes a nap, you'll be convinced the end is nigh.

You’ll try all the tricks to provoke a jab—drinking freezing water, shining a torch at the bump, poking her stomach until your wife firmly bats your hand away and threatens divorce. It's exhausting. You will spend hours in the hospital car park, eating stale vending machine crisps, waiting for non-stress test results because you both panicked at 2am.

When the eviction notice is finally served and she arrives (via a C-section that happens so fast you barely have time to put on the flattering blue scrubs), she will look like a furious, plucked pigeon. She will have absolutely zero body fat. Growth restricted infants don't have those squishy Michelin-man rolls you see in nappy adverts; they look more like tiny, angry old men who have been shrunk in the wash.

Dressing a baby who's mostly wires and elbows

Here's a practical piece of advice: don't bother bringing standard newborn clothes to the hospital. They will swallow her whole. When the nurses finally allow you to dress her amidst the tangle of CPAP wires and feeding tubes, standard clothes will bunch up uncomfortably under her chin and interfere with the monitors.

Dressing a baby who's mostly wires and elbows — A Letter To My Past Self About Surviving An IUGR Baby Diagnosis

The only thing that actually worked for us during that incredibly bleak first week was the Organic Cotton Baby Bodysuit we’d been gifted. Because asymmetrical babies have normal-sized heads but tiny little frog bodies, getting clothes over them without causing a complete meltdown is a logistical nightmare. The envelope shoulders on this onesie meant I could pull it up from the bottom, completely bypassing her delicate, sensor-covered head. The organic cotton didn't agitate her skin, which was already peeling and translucent. It's not a magical cure for the overwhelming dread of the NICU, but being able to dress your child in something that actually fits and doesn't look like medical waste gives you a tiny, pathetic shred of dignity back.

Check out Kianao’s full collection of organic baby clothes to find gentle, breathable options for highly sensitive newborns.

The great temperature and feeding wars

Because she has no fat reserves, your new daughter will be entirely incapable of regulating her own body temperature. She is essentially a shivering raisin. You will spend an obscene amount of time doing kangaroo care, walking around with a tiny human stuffed down your shirt, sweating profusely while trying not to spill lukewarm hospital coffee on her head.

Then comes the feeding. Everyone will pressure you to fatten her up immediately. You will watch the scales with a desperation you previously reserved for the final scores of football matches. But thing is the tired paediatrician will tell you that you must actually listen to: don't force-feed her to catch up too quickly. Her little metabolic system isn't built for a sudden influx of heavy calories, and trying to rapidly pack weight onto a small-for-gestational-age infant apparently sets them up for a whole host of metabolic issues when they're older. It's a terrifyingly delicate balancing act of getting enough calories in her without overloading a digestive system that's already working overtime just to keep her breathing.

Overcompensating with wooden toys

At some point during week three of the hospital stay, you'll have a minor breakdown in the middle of the night and order toys online, convinced that because she's physically small, she's going to be developmentally behind forever.

Overcompensating with wooden toys — A Letter To My Past Self About Surviving An IUGR Baby Diagnosis

You will buy the Rainbow Play Gym Set. Let me tell you right now: it's perfectly fine. It's aesthetically pleasing, made of lovely smooth wood, and looks infinitely better in the living room than the garish plastic monstrosities you bought for the twins. But she's currently the size of a baking potato and spends 23 hours a day asleep. She will stare at the wooden elephant with deep, milky-eyed indifference for at least four months. Save your money for the hospital parking charges right now; the aesthetic wooden gym can wait until she honestly knows she has hands.

The light at the end of the very long, sterile tunnel

The weirdest part of this whole ordeal is how suddenly it becomes normal. The beeping monitors just become the soundtrack to your life. And then, one day, they just... let you leave. They hand you this impossibly fragile creature in a car seat that looks like a spaceship, tell you to make a follow-up appointment, and wave goodbye.

I wish I could tell you the anxiety stops at the sliding hospital doors, but you and I both know that's rubbish. You will still weigh her constantly. You will still panic when she drops a feeding percentile.

But six months on, she's thriving. The catch-up growth happened exactly when they said it would. Her cheeks finally filled out, turning her from a plucked bird into an actual human infant. She's even started teething early, a fresh hell that we're currently combating with the Baby Panda Teether. It's honestly the best thing we own right now—it's silicone, completely flat so her still-clumsy little hands can really grip it, and we just chuck it in the fridge when her gums are particularly red and angry. Watching her aggressively gnaw on a silicone panda while sitting up on her own is a milestone I wasn't sure we'd ever reach back in that dark scanning room.

So, take a deep breath. Stop staring at the sonographer's clicking mouse. It’s going to be a profoundly messy, terrifying few months, but you're going to get through it. And for god's sake, call the babysitter and check on the twins.

Yours,

Tom (six months sleep-deprived and counting)

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The messy, honest questions you're probably Googling at 3am

Will my child always be the smallest in the class?

Honestly, who knows. The doctors vaguely suggested that most of these tiny warriors catch up to their peers by the time they hit age two or three. Ours is currently shooting up the percentile charts like she's trying to win a prize, but some kids just stay petite. As long as they're following their own curve and not dropping off the chart entirely, the health visitors usually stop harassing you.

Is it my fault the placenta stopped working?

No. I know you won't believe me, and I know my wife certainly didn't believe the six different specialists who told her this, but placentas are just weird, temperamental organs that sometimes clock out early. It wasn't the stress, it wasn't the exercise, and it wasn't the half glass of wine you had before you knew you were pregnant.

How do you handle the unsolicited comments about their size?

With biting sarcasm, usually. People in supermarkets love to peer into the pram and say, "Oh, isn't she tiny!" or ask if she's a preemie in a voice dripping with pity. I usually just tell them we shrink-washed her by accident. You eventually learn to just nod and keep walking, because explaining placental insufficiency in the dairy aisle is exhausting.

What's the deal with keeping them warm?

Because they skip the final few weeks of baking in the womb, they miss out on developing 'brown fat', which is the stuff that keeps normal newborns warm. We basically had to dress her in one more layer than we were wearing, and keep the house at a temperature that made me sweat through my t-shirts. Merino wool and organic cotton layers are your best friend here, because synthetic fleece just makes them sweaty and gross without seriously regulating their core temp.

When do the endless hospital appointments stop?

They taper off, I promise. The first month feels like you're practically living at the paediatrician's office, getting weighed and measured and prodded. But once they establish that the baby is gaining weight and hitting basic milestones, the medical team slowly loosens their grip. Eventually, you just become regular, sleep-deprived parents again.