First u/s - measuring bigger/smaller and gender?

[NCBeachyGrl]

OK...it is Saturday and DH is at work, kids watching a movie and I am bored. So, what else do I think about? Gender!

Just wondering if there is any correlation to whether baby measured bigger or smaller at first u/s and gender.

DS1 measured 3 days ahead of what my due date should have been and he has always been a bigger kid (80th percentile for height and weight) and DS2 measured 1 day ahead. This time baby measured 2 days behind so just wondering if it could mean girl or maybe just a smaller boy!

[Mrs_P]

ds1 i had no idea of dates and i went into labour on my due date he was born two days later but looked really over cooked so its poss they got him wrong based on size and he was late (so small for gestation)

ds2 and ds3 they moved my dates saying babe was bigger than my dates but i went into labour and delivered day before the date i'd figured for one, day after for the other and i was sure of my dates so babe measured big for gestation for both of them

[mummypink]

With both my boys they moved my dates back after the u/s. With ds1 it was by 6 days (and he was actually born 2 days early by their dates) and with ds2 it was by about 4 days I think and he was born 10 days earlier then that. They also told me at a later scan with ds2 that he was a big baby (and worried me silly) and when he was born he was only 7lbs! x

[NCBeachyGrl]

I guess it could all depend on whether or not you were confident in O date when determining due date. As we all know, that can get screwy!! Fun to see everyone's experiences though!

[spinningmadly]

With DS1 he was way small, about 3 weeks small, but consistently so he was fine and came on due date, he is just tall and skinny..
DS2 was WAY ahead of due date and came early and was still over 7 lbs.. lol so totally different and both boys

[Rosie85]

I'm not sure but I hope so! I know when I ovulated and what not and my U/S dated me back almost a week so I am hoping the baby being so small means it's a girl. I do know girls run smaller than boys but really there is nothing to compare it to since each baby is different...

[BeadinMom]

My boys were always bigger than they were supposed to be!!!
I bet you're on to something with girls being smaller!!! :)

(Crossing fingers & toes for you!!!)

[dloui128]

I have two girls and a boy on the way, all of them have measure 1-2 weeks ahead and my girls were just shy of 9lbs and I am sure my boy will be the same , I must just make big babies

[hotdogz&boyz]

I recently had a friend with the same situation! She wondered the same thing. Her first three (boys) all measured consistently 3-4 days ahead at the early sono and a week or more at later ones. Her fourth child was always small. Measured 3 days behind at her 8 week sono and a week-and-a-half by the due date. She was team green, but delivered her fourth boy. He is just more petite than his brothers. BUT...even her midwife predicted a girl because of the size variation. So, I think her case might not be the rule. If her midwife even predicted a girl, there might be something to it.

My first measured on time early on. And a little ahead by his delivery time (about a week). My second was 3-4 days ahead at 8 weeks and was measuring a full month ahead by 35 weeks. I have an early sono next Monday, I wonder what it might hold for me!

[nestof3]

My boys - always measured at least 1.5 to 2 weeks ahead on ultrasound.

This baby (girl) - always measured within 1-2 days.

[HopingForPigtails]

Yeah. I don't know. DS1 always measured a few days behind schedule and is now in 75th percentile for height. DS2 always measured right on and he's only in 25th percentile. This one (I did HT for girl but we'll see!) is also measuring right on schedule.

[Throwaway_panther]

Bumping if anyone else has more responses.This baby started measuring 2 days behind after being on track. DD did always measure ahead, so is gender that much of an impact? And did people still have healthy babies even when measuring behind when previously measuring ok?

[ksmom]

DS2 always measured small during my pregnancy and is still small even now at 4 years old. He's a healthy kid, but was just over 6 pounds at birth (full term) when my babies are normally around 7-7.5 lbs. I think gender can be an influencing factor in gestational size but really I think it's just a combination of things like genetics, diet, accuracy of measurements (they can be off sometimes), and environmental factors. Also depending on gestational age, measurements from one baby to another can vary a lot even though the baby is healthy.

This study on how mom can influence gestational size is interesting https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3437780/
There's also this one about baby's sex influencing size:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5135770/

[atomic sagebrush]

People come to me worried about this all the time (baby was ahead but then next scan is a little behind) and they go on to have normal healthy babies at the end of it. Happens at least 2-3 times a week!

We often underestimate how much the skill/caring of the tech comes into play, we're deailing with milimeters of growth and they can absolutely get it wrong sometimes. They may have measured just a wee bit wrong both times (in opposites directions) and that ended up looking like a 2 day margin when in reality there has been no change at all and the baby is growing at the same pace it always was!

[Throwaway_panther]

I just read something that prednisone can affect growth early on, including of the genitals, so now I'm all stressed about that since I'm on it. But stressed about weaning too. Sigh.

[atomic sagebrush]

Steroids can slow growth (one of my sons has to take them for severe allergies, and I worry about it too!) But just keep in mind that no matter what, there was a downside here. The prednisone is very possibly helping this pregnancy to stay and so while yes, this can be a thing, at the same time if you need it, you need it, you know? I know it's still worrying but you are doing the best you can and there are always downsides to any course of action you take.