Weight loss after birth

[Coastingit]

DS was premature - born at 36 wks. It was c section to we were in hospital 2 nights, the first night he was too sleepy to feed much and I immediately switched to formula (which I'm fine with, please no judging re this). He went quickly to taking 30-50ml per feed, now a week old.

Anyway the midwives have visited twice and weighed him and they're not happy with his weight - he lost 8.5% of body weight after birth and today second visit had only gained 20g since they were here two days ago.

I'm so upset and demoralised, it's put a downer on our time he is feeding every three hours, takes loads happily, pooing and peeing well, sleeping loads apart from a 12-3am witching hour - all totally normal and I feel like he is thriving, he is starting to have periods already of wakefulness where he will look around lots and kick and punch the air in that amazingly cute tiny baby way.

How serious is weight loss / slow weight gain and how much is it down to him being premature? Can I relax a little? Am feeling so sad and demoralised rather than enjoying my beautiful baby, their threats of re admitting him just when I am recovering well from the section and really seeing him thrive and bonding well, the idea of having to go back to hospital and whatever they would do there is making me feel so sad.

[squizita]

Congratulations

I thought up to 10% in the first week was deemed safe, provided they start to gain? In which case you're ok.
Hcp who sound scary are the bane of my life. Is the set up near you such that you can ask for input from another mw? I have had to do that before and it turned out to be less scary.
If the nappies and alertness is there and he's started to gain, FX things are on the up for you both.

[NotQuiteCockney]

You say he's pooing and peeing well, can you talk more about that? How many poos per 24 hour period, and how many of those are at least the size of a £2 coin.

Are they weighing him on digital scales?

You say he's feeding every three hours - is it always every three hours? Are you offering more often? Feeding only every three hours isn't very much for a newborn, particularly when he's been a bit prem ...

[NotQuiteCockney]

You say he's pooing and peeing well, can you talk more about that? How many poos per 24 hour period, and how many of those are at least the size of a £2 coin.

Are they weighing him on digital scales?

You say he's feeding every three hours - is it always every three hours? Are you offering more often? Feeding only every three hours isn't very much for a newborn, particularly when he's been a bit prem ...

[ChocolateBiscuitCake]

He sounds like he is doing great. 10% becomes a cause for concern. He has started to gain - it's great news. Please enjoy & relax.

just ensure nappies are properly wet and poos are turning mustard yellow. Record frequency and take photos to show midwives.