6 month old motor development

[childcarehell]

My ds and dd are so far apart developmentally I just wanted to ask what is normal as I'm finding it hard to judge. ds at this age was rocking on all fours, sitting, rolling an jumping in a jumperoo. It brought it back today holding a few 4/5 month olds at playgroup and they seemed ahead of dd, better head control, moving towards sitting with a straight back and attempting to use arms to support. I wanted to ask if she's within the normal range or if these are concerns:

-head control but not great, still flops forward a lot and if in a sitting position is an effort. Does though hold it steady when lifted.
-nowhere near sitting, curved back and zero balance
-nowhere near rolling
-quite hard to dress, particularly unbending the left arm, jackets are a nightmare as straightening her arms is a fight
-on her front can briefly lift head a little, about 5 seconds and chin up a few inches then flops

Positives are she is very very happy, one of those babies who people comment on how she is always smiling. Good at breastfeeding (dribbles bottles at the corners and food is the usual mess). She's fat chubby, loads of rolls (going down three centiles though so obviously very short, she is noticeably small, the only one I know on a par size wise was a 4lb premmie and she's longer and younger)

To add in the mix in her first few days we noticed a few quirks, her left eye is a little smaller, her first smiles were lopsided to the right, still a little wonky on big cries and her left arm was very scrunched and she batted out with her right first though now it's a similar movement . Seems to favour he right with new skills, but in days does it with her left. She was quite flat as a newborn in comparison to her brother who brought his arms to his chest and was a curled up shape. She was though late pre-term, though straight home and 6lb at 35 weeks. Good scores and a quick (24 min!) labour, bit bruised and blue in the face at first. Fed and had a wee in minutes. Re-admitted at 5 days for jaundice with 24 hours under lights and kept in for 4 days for 'monitoring' as they were concerned about weight/ feeding/ sleeping/ possible infection/ dehydration.

You need to see your gp as soon as you can to discuss your concerns & so they can do a full examination and depending on their assessment decide if she needs referal to paediatrics. You'll be worrying about it till you do & better to talk to someone sooner rather than later who can do something about it if needed.

I would also see GP. The differences between the sidea would be my issue I think.

My almost 6 month old can't sit at all without support, but is crawling and rolled at 4 months. They are all very different though but I would visit the gp mainly to see if further investigation is necessary.

Well surprisingly the GP had an appointment this morning when I rung (thank you for the advice, it was the nudge I needed). It's left more questions than answers though. She wasn't fussed with most the motor control but she seemed only concerned with the fact dd cannot elevate one arm at all and can only extend sideways with a bit of force and discomfort. She would only say there seemed to be a problem and she'd get back to me in a week after talking to a colleague who's a paediatrician.
I'm now left to speculate, I was expecting a don't worry/ wait and see response.
If you've heard of similar I'd be grateful. I'm sure she's never injured herself, she's immobile, always with me and always content. Never acted as if in pain.

Could something have happened at birth? Surely not, as they seem to check small babies all the time.

I reckon I'd be pushing for a referral to a paed to be on the safe side.

Glad you went to see the gp but understand frustrating to feel a bit in limbo but better for gp to be honest and say may be a problem but doesn't know enough to be able to give you more info and for you to be seen by paeds. Hope you get some answers soon and it's not too long a process for you. And fingers crossed it's positive too.