👉 Puerperium, also known as the "first trimester," is a period of time during which a pregnant woman's body needs to recover from pregnancy and prepare for delivery. During this time, she may experience a range of physical changes, including swelling in her legs, stomach cramps, and headaches. Puerperium can be defined as the first 3-4 weeks after a pregnancy ends and is often associated with postpartum depression or other health issues.