Hi, what is this 'in' doing here? The phrase would stand without it, or even 'in' and 'at' altogether, wouldn't it?
On the day of the birth, she settled in between the hospital's crisp white sheets and prepared for a rerun of the first long haul. But it was not to be. She barely had time to take notice of her surroundings before she was wheeled to the delivery room. Within an hour, Morag had effortlessly and painlessly arrived, weighing in at 7 lb 13 oz.
('Mummy, Take Me Home' by David Leslie)