lie in
verb
- lie in bed, confinement or bed rest, sometimes for child birth
Wiktionary
verb
- To be brought to bed in childbirth.
“he had been driven to it by the distress he mentioned, the greatest indeed imaginable, that of five hungry children, and a wife lying in of the sixth, in the utmost want and misery.”
- To stay in bed (longer than usual).
“I've got a day off tomorrow, so I might lie in till about 11.”