Birth weight sibling difference

[JosieK8]

I’m expecting my second baby (another girl) but she is measuring much smaller than first. My first was born at 39+6 and weighed 4.2kg (over 9 lbs). This was a surprise and I wasn’t induced. I didn’t have gestational diabetes. My second is now measuring on the 10-13th centile and I’ve had to go for extra growth scans as fundal height small. Everything looks normal just baby is small and there doesn’t seem to be any explanation. Has anyone else experienced this. I’m 34 weeks pregnant now.

I had the opposite my first was born 38+4 and weighed a dinky 5lb 8oz on 2nd centile she was small for 3 years now she's 7 and one of the tallest in her class! My second gave me a huge bump and weighed an exactly average 7lb 4oz 50th centile -she was born 39 weeks exactly -they have no idea why my first was teeny and second average but they're both healthy and no issue caused by their birth weight!

I had a nine pounder for my first (ten days over due) and my second was just under seven pounds. I also had a lot of scaremongering about how small he was. He was a perfectly average size baby who arrived on his due date. He's six foot one now right enough...

Our first was 10lb 3 , second was 7 lb 13 . I don’t think there is anything abnormal about it .

My 3rd baby went for so many growth scans as he was measuring small. He came out 10pound 2. There's a huge range of healthy baby size now not sure what makes them different

I'm the opposite. My eldest daughter (15 now)born 6lbs1oz (2008)at 38 weeks.my 2nd daughter was 7lbs6oz(2014) at 38 weeks.
My son was 9lbs6oz (2021).
I'm currently 37 weeks pregnant and baby is weighing over 7lbs.