My ds had IUGR and was closely monitored for the whole of the last trimester. I sometimes wonder about the number of scans he had as a result - he had weekly doppler and growth scans, plus some other additional scans.
His abdominal measurement was off the bottom scale and everthing else was tracking the 2nd centile. He had a growth spurt in the last week before my due date and ended up on the 9th centile (he has been on it ever since) but when he was born, his head measured a couple of centiles higher than everywhere else. (I can't remember the exact figures and am too lazy tired to go and get his red book.) He was 6lb 9oz when he was born, but really skinny. My other two dcs were ds2 7lb 12oz and dd 7lb 8oz.
He was a back to back prolonged labour (3 days) followed by syntocin drip then an epidural, which I was basically bullied into having because I was exhausted and they felt my muscles were too tight and would relax better one the epi was done. The mw topped up the epi in error when I said I was feeling a lot of pain, then his heart rate dropped through the floor and the room filled with a ridiculous number of people, including the registrar who geared up to do a kiwi ventouse delivery, but one big push and there he was - no ventouse necessary and with a decent apgar. The hospital said the deceleration was actually ds moving into the birth canal very quickly, but I have always wondered about it.
Other than that, I had a really healthy pregnancy with just one odd episode of raised bloodpressure (I normally have very low blood pressure) where I had two days bed rest and it settled right down.
We have a clear genetic link on dh's father's side and a highly probably genetic link on my mother's side as well.